252839857 has 2 divisors, whose sum is σ = 252839858. Its totient is φ = 252839856.

The previous prime is 252839849. The next prime is 252839887. The reversal of 252839857 is 758938252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243328801 + 9511056 = 15599^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 252839857 - 2³ = 252839849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252839857.

It is not a weakly prime, because it can be changed into another prime (252839887) 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, 126419928 + 126419929.

It is an arithmetic number, because the mean of its divisors is an integer number (126419929).

Almost surely, 2^252839857 is an apocalyptic number.

It is an amenable number.

252839857 is a deficient number, since it is larger than the sum of its proper divisors (1).

252839857 is an equidigital number, since it uses as much as digits as its factorization.

252839857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 49.

The square root of 252839857 is about 15900.9388716516. The cubic root of 252839857 is about 632.3368799307.

The spelling of 252839857 in words is "two hundred fifty-two million, eight hundred thirty-nine thousand, eight hundred fifty-seven".