3156869 has 4 divisors (see below), whose sum is σ = 3323040. Its totient is φ = 2990700.

The previous prime is 3156841. The next prime is 3156871. The reversal of 3156869 is 9686513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9686513 = 241 ⋅40193.

It is a cyclic number.

It is not a de Polignac number, because 3156869 - 2⁸ = 3156613 is a prime.

It is a super-2 number, since 2×3156869² = 19931643766322, 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 (3156809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83057 + ... + 83094.

It is an arithmetic number, because the mean of its divisors is an integer number (830760).

Almost surely, 2^3156869 is an apocalyptic number.

It is an amenable number.

3156869 is a deficient number, since it is larger than the sum of its proper divisors (166171).

3156869 is a wasteful number, since it uses less digits than its factorization.

3156869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166170.

The product of its digits is 38880, while the sum is 38.

The square root of 3156869 is about 1776.7580026554. The cubic root of 3156869 is about 146.6961964187.

The spelling of 3156869 in words is "three million, one hundred fifty-six thousand, eight hundred sixty-nine".