102556 has 6 divisors (see below), whose sum is σ = 179480. Its totient is φ = 51276.

The previous prime is 102551. The next prime is 102559. The reversal of 102556 is 655201.

It is a happy number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12816 + ... + 12823.

2¹⁰²⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

102556 is a deficient number, since it is larger than the sum of its proper divisors (76924).

102556 is a wasteful number, since it uses less digits than its factorization.

102556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25643 (or 25641 counting only the distinct ones).

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

The square root of 102556 is about 320.2436572362. The cubic root of 102556 is about 46.8080294013.

Adding to 102556 its reverse (655201), we get a palindrome (757757).

It can be divided in two parts, 1025 and 56, that added together give a triangular number (1081 = T₄₆).

The spelling of 102556 in words is "one hundred two thousand, five hundred fifty-six".