156556 has 6 divisors (see below), whose sum is σ = 273980. Its totient is φ = 78276.

The previous prime is 156539. The next prime is 156577. The reversal of 156556 is 655651.

It is a super-2 number, since 2×156556² = 49019562272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19566 + ... + 19573.

2¹⁵⁶⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

156556 is a deficient number, since it is larger than the sum of its proper divisors (117424).

156556 is a wasteful number, since it uses less digits than its factorization.

156556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39143 (or 39141 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 156556 is about 395.6715809860. The cubic root of 156556 is about 53.8960046972.

It can be divided in two parts, 156 and 556, that multiplied together give a triangular number (86736 = T₄₁₆).

The spelling of 156556 in words is "one hundred fifty-six thousand, five hundred fifty-six".