252645161 has 2 divisors, whose sum is σ = 252645162. Its totient is φ = 252645160.

The previous prime is 252645131. The next prime is 252645191. The reversal of 252645161 is 161546252.

It is a balanced prime because it is at equal distance from previous prime (252645131) and next prime (252645191).

It can be written as a sum of positive squares in only one way, i.e., 237745561 + 14899600 = 15419^2 + 3860^2 .

It is a cyclic number.

It is not a de Polignac number, because 252645161 - 2¹⁰ = 252644137 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_13816076 and since 252645161 and 13816076 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (252645121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126322580 + 126322581.

It is an arithmetic number, because the mean of its divisors is an integer number (126322581).

Almost surely, 2^252645161 is an apocalyptic number.

It is an amenable number.

252645161 is a deficient number, since it is larger than the sum of its proper divisors (1).

252645161 is an equidigital number, since it uses as much as digits as its factorization.

252645161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 252645161 is about 15894.8155384075. The cubic root of 252645161 is about 632.1745306914.

The spelling of 252645161 in words is "two hundred fifty-two million, six hundred forty-five thousand, one hundred sixty-one".