252921005 has 8 divisors (see below), whose sum is σ = 310908024. Its totient is φ = 197401600.

The previous prime is 252920981. The next prime is 252921017. The reversal of 252921005 is 500129252.

252921005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8655364 + 244265641 = 2942^2 + 15629^2 .

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

It is not a de Polignac number, because 252921005 - 2⁸ = 252920749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616676 + ... + 617085.

It is an arithmetic number, because the mean of its divisors is an integer number (38863503).

Almost surely, 2^252921005 is an apocalyptic number.

It is an amenable number.

252921005 is a deficient number, since it is larger than the sum of its proper divisors (57987019).

252921005 is a wasteful number, since it uses less digits than its factorization.

252921005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233807.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 252921005 is about 15903.4903401738. The cubic root of 252921005 is about 632.4045214083.

The spelling of 252921005 in words is "two hundred fifty-two million, nine hundred twenty-one thousand, five".