252405779 has 2 divisors, whose sum is σ = 252405780. Its totient is φ = 252405778.

The previous prime is 252405773. The next prime is 252405793. The reversal of 252405779 is 977504252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252405779 - 2¹² = 252401683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (252405773) 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, 126202889 + 126202890.

It is an arithmetic number, because the mean of its divisors is an integer number (126202890).

Almost surely, 2^252405779 is an apocalyptic number.

252405779 is a deficient number, since it is larger than the sum of its proper divisors (1).

252405779 is an equidigital number, since it uses as much as digits as its factorization.

252405779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 252405779 is about 15887.2835626485. The cubic root of 252405779 is about 631.9748052166.

The spelling of 252405779 in words is "two hundred fifty-two million, four hundred five thousand, seven hundred seventy-nine".