102000556 has 18 divisors (see below), whose sum is σ = 207644388. Its totient is φ = 43714440.

The previous prime is 102000551. The next prime is 102000581. The reversal of 102000556 is 655000201.

It is a happy number.

It is a super-2 number, since 2×102000556² = 20808226848618272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102000551) 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 5 ways as a sum of consecutive naturals, for example, 260010 + ... + 260401.

Almost surely, 2^102000556 is an apocalyptic number.

It is an amenable number.

102000556 is an abundant number, since it is smaller than the sum of its proper divisors (105643832).

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

102000556 is a wasteful number, since it uses less digits than its factorization.

102000556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520429 (or 520420 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 102000556 is about 10099.5324644263. The cubic root of 102000556 is about 467.2337217931.

Adding to 102000556 its reverse (655000201), we get a palindrome (757000757).

The spelling of 102000556 in words is "one hundred two million, five hundred fifty-six", and thus it is an aban number.