156987 has 6 divisors (see below), whose sum is σ = 226772. Its totient is φ = 104652.

The previous prime is 156979. The next prime is 157007. The reversal of 156987 is 789651.

It is not a de Polignac number, because 156987 - 2³ = 156979 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 156987.

It is not an unprimeable number, because it can be changed into a prime (156967) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8713 + ... + 8730.

2¹⁵⁶⁹⁸⁷ is an apocalyptic number.

156987 is a deficient number, since it is larger than the sum of its proper divisors (69785).

156987 is a wasteful number, since it uses less digits than its factorization.

156987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17449 (or 17446 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 156987 is about 396.2158502635. The cubic root of 156987 is about 53.9454180995.

It can be divided in two parts, 1569 and 87, that multiplied together give a triangular number (136503 = T₅₂₂).

The spelling of 156987 in words is "one hundred fifty-six thousand, nine hundred eighty-seven".