252639659 has 4 divisors (see below), whose sum is σ = 263624016. Its totient is φ = 241655304.

The previous prime is 252639649. The next prime is 252639661. The reversal of 252639659 is 956936252.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 252639659 - 2¹⁶ = 252574123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252639649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5492144 + ... + 5492189.

It is an arithmetic number, because the mean of its divisors is an integer number (65906004).

Almost surely, 2^252639659 is an apocalyptic number.

252639659 is a deficient number, since it is larger than the sum of its proper divisors (10984357).

252639659 is a wasteful number, since it uses less digits than its factorization.

252639659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10984356.

The product of its digits is 874800, while the sum is 47.

The square root of 252639659 is about 15894.6424621632. The cubic root of 252639659 is about 632.1699415812.

The spelling of 252639659 in words is "two hundred fifty-two million, six hundred thirty-nine thousand, six hundred fifty-nine".