3156161 has 2 divisors, whose sum is σ = 3156162. Its totient is φ = 3156160.

The previous prime is 3156151. The next prime is 3156187. The reversal of 3156161 is 1616513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2265025 + 891136 = 1505^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 3156161 - 2¹⁰ = 3155137 is a prime.

It is a super-2 number, since 2×3156161² = 19922704515842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3156121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1578080 + 1578081.

It is an arithmetic number, because the mean of its divisors is an integer number (1578081).

Almost surely, 2^3156161 is an apocalyptic number.

It is an amenable number.

3156161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3156161 is an equidigital number, since it uses as much as digits as its factorization.

3156161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 3156161 is about 1776.5587521948. The cubic root of 3156161 is about 146.6852289408.

The spelling of 3156161 in words is "three million, one hundred fifty-six thousand, one hundred sixty-one".