102556020 has 72 divisors (see below), whose sum is σ = 334049184. Its totient is φ = 23440704.

The previous prime is 102556009. The next prime is 102556037. The reversal of 102556020 is 20655201.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 14502 + ... + 20381.

It is an arithmetic number, because the mean of its divisors is an integer number (4639572).

Almost surely, 2^102556020 is an apocalyptic number.

102556020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102556020 is an abundant number, since it is smaller than the sum of its proper divisors (231493164).

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

102556020 is a wasteful number, since it uses less digits than its factorization.

102556020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34909 (or 34900 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 102556020 is about 10126.9946183456. The cubic root of 102556020 is about 468.0803244406.

The spelling of 102556020 in words is "one hundred two million, five hundred fifty-six thousand, twenty".