252643787 has 8 divisors (see below), whose sum is σ = 275754240. Its totient is φ = 229557160.

The previous prime is 252643751. The next prime is 252643813. The reversal of 252643787 is 787346252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252643787 - 2¹² = 252639691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252643747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21914 + ... + 31392.

It is an arithmetic number, because the mean of its divisors is an integer number (34469280).

Almost surely, 2^252643787 is an apocalyptic number.

252643787 is a deficient number, since it is larger than the sum of its proper divisors (23110453).

252643787 is a wasteful number, since it uses less digits than its factorization.

252643787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11913.

The product of its digits is 564480, while the sum is 44.

The square root of 252643787 is about 15894.7723167084. The cubic root of 252643787 is about 632.1733846712.

The spelling of 252643787 in words is "two hundred fifty-two million, six hundred forty-three thousand, seven hundred eighty-seven".