3156121 has 2 divisors, whose sum is σ = 3156122. Its totient is φ = 3156120.

The previous prime is 3156113. The next prime is 3156151. The reversal of 3156121 is 1216513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 1413721 = 1320^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 3156121 - 2³ = 3156113 is a prime.

It is a super-2 number, since 2×3156121² = 19922199533282, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

3156121 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3156151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1578060 + 1578061.

It is an arithmetic number, because the mean of its divisors is an integer number (1578061).

Almost surely, 2^3156121 is an apocalyptic number.

It is an amenable number.

3156121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3156121 is an equidigital number, since it uses as much as digits as its factorization.

3156121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 3156121 is about 1776.5474944397. The cubic root of 3156121 is about 146.6846092604.

The spelling of 3156121 in words is "three million, one hundred fifty-six thousand, one hundred twenty-one".