252790661 has 4 divisors (see below), whose sum is σ = 253394400. Its totient is φ = 252186924.

The previous prime is 252790639. The next prime is 252790667. The reversal of 252790661 is 166097252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252790661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252790667) 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 in 3 ways as a sum of consecutive naturals, for example, 301241 + ... + 302078.

It is an arithmetic number, because the mean of its divisors is an integer number (63348600).

Almost surely, 2^252790661 is an apocalyptic number.

It is an amenable number.

252790661 is a deficient number, since it is larger than the sum of its proper divisors (603739).

252790661 is an equidigital number, since it uses as much as digits as its factorization.

252790661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603738.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 252790661 is about 15899.3918437153. The cubic root of 252790661 is about 632.2958652171.

The spelling of 252790661 in words is "two hundred fifty-two million, seven hundred ninety thousand, six hundred sixty-one".