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1242018570 = 2351322314281
BaseRepresentation
bin100101000000111…
…1011001100001010
310012120002002011210
41022001323030022
510020424043240
6323124433550
742530661252
oct11201731412
93176062153
101242018570
115880a5a31
122a7b488b6
1316a416a40
14bad4a962
157408a780
hex4a07b30a

1242018570 has 64 divisors (see below), whose sum is σ = 3224761344. Its totient is φ = 304335360.

The previous prime is 1242018559. The next prime is 1242018587. The reversal of 1242018570 is 758102421.

It is a super-2 number, since 2×12420185702 = 3085220256449689800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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, 79830 + ... + 94110.

It is an arithmetic number, because the mean of its divisors is an integer number (50386896).

Almost surely, 21242018570 is an apocalyptic number.

1242018570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242018570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1612380672).

1242018570 is an abundant number, since it is smaller than the sum of its proper divisors (1982742774).

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

1242018570 is a wasteful number, since it uses less digits than its factorization.

1242018570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14527.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 1242018570 is about 35242.2838363237. The cubic root of 1242018570 is about 1074.9197185405.

The spelling of 1242018570 in words is "one billion, two hundred forty-two million, eighteen thousand, five hundred seventy".

Divisors: 1 2 3 5 6 10 13 15 26 30 39 65 78 130 195 223 390 446 669 1115 1338 2230 2899 3345 5798 6690 8697 14281 14495 17394 28562 28990 42843 43485 71405 85686 86970 142810 185653 214215 371306 428430 556959 928265 1113918 1856530 2784795 3184663 5569590 6369326 9553989 15923315 19107978 31846630 41400619 47769945 82801238 95539890 124201857 207003095 248403714 414006190 621009285 1242018570