252505861 has 4 divisors (see below), whose sum is σ = 252833292. Its totient is φ = 252178432.

The previous prime is 252505859. The next prime is 252505867. The reversal of 252505861 is 168505252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47472100 + 205033761 = 6890^2 + 14319^2 .

It is a cyclic number.

It is not a de Polignac number, because 252505861 - 2¹ = 252505859 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 (252505867) 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, 162556 + ... + 164101.

It is an arithmetic number, because the mean of its divisors is an integer number (63208323).

Almost surely, 2^252505861 is an apocalyptic number.

It is an amenable number.

252505861 is a deficient number, since it is larger than the sum of its proper divisors (327431).

252505861 is an equidigital number, since it uses as much as digits as its factorization.

252505861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327430.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 252505861 is about 15890.4330022816. The cubic root of 252505861 is about 632.0583227769.

The spelling of 252505861 in words is "two hundred fifty-two million, five hundred five thousand, eight hundred sixty-one".