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102021040 = 24511115933
BaseRepresentation
bin1100001010010…
…11011110110000
321002222012120001
412011023132300
5202104133130
614042355344
72346110302
oct605133660
9232865501
10102021040
1152651a10
122a1bbb54
13181a06a4
14d799972
158e536ca
hex614b7b0

102021040 has 40 divisors (see below), whose sum is σ = 258764688. Its totient is φ = 37098240.

The previous prime is 102021037. The next prime is 102021083. The reversal of 102021040 is 40120201.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

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 7 ways as a sum of consecutive naturals, for example, 57087 + ... + 58846.

Almost surely, 2102021040 is an apocalyptic number.

102021040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021040 is an abundant number, since it is smaller than the sum of its proper divisors (156743648).

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

102021040 is a wasteful number, since it uses less digits than its factorization.

102021040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115957 (or 115951 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 102021040 is about 10100.5465198671. The cubic root of 102021040 is about 467.2649967041.

Adding to 102021040 its reverse (40120201), we get a palindrome (142141241).

The spelling of 102021040 in words is "one hundred two million, twenty-one thousand, forty".

Divisors: 1 2 4 5 8 10 11 16 20 22 40 44 55 80 88 110 176 220 440 880 115933 231866 463732 579665 927464 1159330 1275263 1854928 2318660 2550526 4637320 5101052 6376315 9274640 10202104 12752630 20404208 25505260 51010520 102021040