252791237 has 2 divisors, whose sum is σ = 252791238. Its totient is φ = 252791236.

The previous prime is 252791221. The next prime is 252791243. The reversal of 252791237 is 732197252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139027681 + 113763556 = 11791^2 + 10666^2 .

It is a cyclic number.

It is not a de Polignac number, because 252791237 - 2⁴ = 252791221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252791237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252791537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126395618 + 126395619.

It is an arithmetic number, because the mean of its divisors is an integer number (126395619).

Almost surely, 2^252791237 is an apocalyptic number.

It is an amenable number.

252791237 is a deficient number, since it is larger than the sum of its proper divisors (1).

252791237 is an equidigital number, since it uses as much as digits as its factorization.

252791237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 252791237 is about 15899.4099576053. The cubic root of 252791237 is about 632.2963454592.

The spelling of 252791237 in words is "two hundred fifty-two million, seven hundred ninety-one thousand, two hundred thirty-seven".