252389861 has 4 divisors (see below), whose sum is σ = 254840352. Its totient is φ = 249939372.

The previous prime is 252389857. The next prime is 252389867. The reversal of 252389861 is 168983252.

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 252389861 - 2² = 252389857 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 (252389867) 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, 1225091 + ... + 1225296.

It is an arithmetic number, because the mean of its divisors is an integer number (63710088).

Almost surely, 2^252389861 is an apocalyptic number.

It is an amenable number.

252389861 is a deficient number, since it is larger than the sum of its proper divisors (2450491).

252389861 is a wasteful number, since it uses less digits than its factorization.

252389861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450490.

The product of its digits is 207360, while the sum is 44.

The square root of 252389861 is about 15886.7825880510. The cubic root of 252389861 is about 631.9615197489.

The spelling of 252389861 in words is "two hundred fifty-two million, three hundred eighty-nine thousand, eight hundred sixty-one".