252420739 has 2 divisors, whose sum is σ = 252420740. Its totient is φ = 252420738.

The previous prime is 252420731. The next prime is 252420827. The reversal of 252420739 is 937024252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252420739 - 2³ = 252420731 is a prime.

It is a super-2 number, since 2×252420739² = 127432458954612242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252420731) 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, 126210369 + 126210370.

It is an arithmetic number, because the mean of its divisors is an integer number (126210370).

Almost surely, 2^252420739 is an apocalyptic number.

252420739 is a deficient number, since it is larger than the sum of its proper divisors (1).

252420739 is an equidigital number, since it uses as much as digits as its factorization.

252420739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 252420739 is about 15887.7543724719. The cubic root of 252420739 is about 631.9872906099.

The spelling of 252420739 in words is "two hundred fifty-two million, four hundred twenty thousand, seven hundred thirty-nine".