16257161 has 2 divisors, whose sum is σ = 16257162. Its totient is φ = 16257160.

The previous prime is 16257133. The next prime is 16257181. The reversal of 16257161 is 16175261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8667136 + 7590025 = 2944^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 16257161 - 2¹⁰ = 16256137 is a prime.

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 (16257121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8128580 + 8128581.

It is an arithmetic number, because the mean of its divisors is an integer number (8128581).

Almost surely, 2^16257161 is an apocalyptic number.

It is an amenable number.

16257161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16257161 is an equidigital number, since it uses as much as digits as its factorization.

16257161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 29.

The square root of 16257161 is about 4032.0169890515. The cubic root of 16257161 is about 253.3270518218.

It can be divided in two parts, 162571 and 61, that multiplied together give a triangular number (9916831 = T₄₄₅₃).

The spelling of 16257161 in words is "sixteen million, two hundred fifty-seven thousand, one hundred sixty-one".