252661501 has 4 divisors (see below), whose sum is σ = 260811904. Its totient is φ = 244511100.

The previous prime is 252661471. The next prime is 252661529. The reversal of 252661501 is 105166252.

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 not a de Polignac number, because 252661501 - 2⁵ = 252661469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252661501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252661571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4075155 + ... + 4075216.

It is an arithmetic number, because the mean of its divisors is an integer number (65202976).

Almost surely, 2^252661501 is an apocalyptic number.

It is an amenable number.

252661501 is a deficient number, since it is larger than the sum of its proper divisors (8150403).

252661501 is an equidigital number, since it uses as much as digits as its factorization.

252661501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8150402.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 252661501 is about 15895.3295341745. The cubic root of 252661501 is about 632.1881591722.

The spelling of 252661501 in words is "two hundred fifty-two million, six hundred sixty-one thousand, five hundred one".