252389405 has 8 divisors (see below), whose sum is σ = 305866584. Its totient is φ = 199912000.

The previous prime is 252389359. The next prime is 252389479. The reversal of 252389405 is 504983252.

It can be written as a sum of positive squares in 4 ways, for example, as 85618009 + 166771396 = 9253^2 + 12914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252389405 - 2⁸ = 252389149 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 7 ways as a sum of consecutive naturals, for example, 249386 + ... + 250395.

It is an arithmetic number, because the mean of its divisors is an integer number (38233323).

Almost surely, 2^252389405 is an apocalyptic number.

It is an amenable number.

252389405 is a deficient number, since it is larger than the sum of its proper divisors (53477179).

252389405 is a wasteful number, since it uses less digits than its factorization.

252389405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499887.

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

The square root of 252389405 is about 15886.7682364916. The cubic root of 252389405 is about 631.9611391544.

It can be divided in two parts, 25238 and 9405, that added together give a palindrome (34643).

The spelling of 252389405 in words is "two hundred fifty-two million, three hundred eighty-nine thousand, four hundred five".