102642885 has 24 divisors (see below), whose sum is σ = 182256984. Its totient is φ = 53406720.

The previous prime is 102642871. The next prime is 102642887. The reversal of 102642885 is 588246201.

102642885 is a `hidden beast` number, since 1 + 0 + 2 + 642 + 8 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3560769 + 99082116 = 1887^2 + 9954^2 .

It is not a de Polignac number, because 102642885 - 2¹⁷ = 102511813 is a prime.

It is a super-2 number, since 2×102642885² = 21071123682246450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102642887) 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 23 ways as a sum of consecutive naturals, for example, 25972 + ... + 29661.

It is an arithmetic number, because the mean of its divisors is an integer number (7594041).

Almost surely, 2^102642885 is an apocalyptic number.

102642885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102642885 is a deficient number, since it is larger than the sum of its proper divisors (79614099).

102642885 is a wasteful number, since it uses less digits than its factorization.

102642885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55685 (or 55682 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 102642885 is about 10131.2824953211. The cubic root of 102642885 is about 468.2124419024.

The spelling of 102642885 in words is "one hundred two million, six hundred forty-two thousand, eight hundred eighty-five".