3156409 has 2 divisors, whose sum is σ = 3156410. Its totient is φ = 3156408.

The previous prime is 3156401. The next prime is 3156427. The reversal of 3156409 is 9046513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2295225 + 861184 = 1515^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 3156409 - 2³ = 3156401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3156401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1578204 + 1578205.

It is an arithmetic number, because the mean of its divisors is an integer number (1578205).

Almost surely, 2^3156409 is an apocalyptic number.

It is an amenable number.

3156409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3156409 is an equidigital number, since it uses as much as digits as its factorization.

3156409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 3156409 is about 1776.6285486843. The cubic root of 3156409 is about 146.6890708428.

It can be divided in two parts, 315 and 6409, that added together give a square (6724 = 82²).

The spelling of 3156409 in words is "three million, one hundred fifty-six thousand, four hundred nine".