156069 has 6 divisors (see below), whose sum is σ = 225446. Its totient is φ = 104040.

The previous prime is 156061. The next prime is 156071. The reversal of 156069 is 960651.

It can be written as a sum of positive squares in only one way, i.e., 152100 + 3969 = 390^2 + 63^2 .

It is not a de Polignac number, because 156069 - 2³ = 156061 is a prime.

It is a super-2 number, since 2×156069² = 48715065522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156061) 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, 8662 + ... + 8679.

2¹⁵⁶⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

156069 is a deficient number, since it is larger than the sum of its proper divisors (69377).

156069 is a wasteful number, since it uses less digits than its factorization.

156069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17347 (or 17344 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 156069 is about 395.0556922764. The cubic root of 156069 is about 53.8400617388.

Subtracting from 156069 its product of nonzero digits (1620), we obtain a square (154449 = 393²).

It can be divided in two parts, 15 and 6069, that added together give a square (6084 = 78²).

The spelling of 156069 in words is "one hundred fifty-six thousand, sixty-nine".