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1242459660 = 2235133834159
BaseRepresentation
bin100101000001110…
…0110111000001100
310012120220111020110
41022003212320030
510021032202120
6323142120020
742534506241
oct11203467014
93176814213
101242459660
11588377372
122a8120010
1316a53c740
14bb0235c8
15741262e0
hex4a0e6e0c

1242459660 has 96 divisors (see below), whose sum is σ = 3757178880. Its totient is φ = 304964352.

The previous prime is 1242459653. The next prime is 1242459661. The reversal of 1242459660 is 669542421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1242459661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296661 + ... + 300819.

It is an arithmetic number, because the mean of its divisors is an integer number (39137280).

Almost surely, 21242459660 is an apocalyptic number.

1242459660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242459660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878589440).

1242459660 is an abundant number, since it is smaller than the sum of its proper divisors (2514719220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242459660 is a wasteful number, since it uses less digits than its factorization.

1242459660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4567 (or 4565 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 1242459660 is about 35248.5412464119. The cubic root of 1242459660 is about 1075.0469523390.

The spelling of 1242459660 in words is "one billion, two hundred forty-two million, four hundred fifty-nine thousand, six hundred sixty".

Divisors: 1 2 3 4 5 6 10 12 13 15 20 26 30 39 52 60 65 78 130 156 195 260 383 390 766 780 1149 1532 1915 2298 3830 4159 4596 4979 5745 7660 8318 9958 11490 12477 14937 16636 19916 20795 22980 24895 24954 29874 41590 49790 49908 54067 59748 62385 74685 83180 99580 108134 124770 149370 162201 216268 249540 270335 298740 324402 540670 648804 811005 1081340 1592897 1622010 3185794 3244020 4778691 6371588 7964485 9557382 15928970 19114764 20707661 23893455 31857940 41415322 47786910 62122983 82830644 95573820 103538305 124245966 207076610 248491932 310614915 414153220 621229830 1242459660