3156165 has 20 divisors (see below), whose sum is σ = 5658444. Its totient is φ = 1683072.

The previous prime is 3156161. The next prime is 3156187. The reversal of 3156165 is 5616513.

It is a happy number.

3156165 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 2313441 + 842724 = 1521^2 + 918^2 .

It is not a de Polignac number, because 3156165 - 2² = 3156161 is a prime.

It is a super-2 number, since 2×3156165² = 19922755014450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3156161) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3492 + ... + 4301.

Almost surely, 2^3156165 is an apocalyptic number.

It is an amenable number.

3156165 is a deficient number, since it is larger than the sum of its proper divisors (2502279).

3156165 is an equidigital number, since it uses as much as digits as its factorization.

3156165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810 (or 7801 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 3156165 is about 1776.5598779664. The cubic root of 3156165 is about 146.6852909086.

It can be divided in two parts, 31561 and 65, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 3156165 in words is "three million, one hundred fifty-six thousand, one hundred sixty-five".