252938405 has 4 divisors (see below), whose sum is σ = 303526092. Its totient is φ = 202350720.

The previous prime is 252938339. The next prime is 252938437. The reversal of 252938405 is 504839252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106213636 + 146724769 = 10306^2 + 12113^2 .

It is not a de Polignac number, because 252938405 - 2¹² = 252934309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 25293836 + ... + 25293845.

It is an arithmetic number, because the mean of its divisors is an integer number (75881523).

Almost surely, 2^252938405 is an apocalyptic number.

It is an amenable number.

252938405 is a deficient number, since it is larger than the sum of its proper divisors (50587687).

252938405 is an equidigital number, since it uses as much as digits as its factorization.

252938405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50587686.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 252938405 is about 15904.0373804893. The cubic root of 252938405 is about 632.4190234150.

The spelling of 252938405 in words is "two hundred fifty-two million, nine hundred thirty-eight thousand, four hundred five".