252791287 has 8 divisors (see below), whose sum is σ = 289476000. Its totient is φ = 216249504.

The previous prime is 252791269. The next prime is 252791299. The reversal of 252791287 is 782197252.

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 252791287 - 2⁷ = 252791159 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 (252791237) 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, 31912 + ... + 39037.

It is an arithmetic number, because the mean of its divisors is an integer number (36184500).

Almost surely, 2^252791287 is an apocalyptic number.

252791287 is a deficient number, since it is larger than the sum of its proper divisors (36684713).

252791287 is an equidigital number, since it uses as much as digits as its factorization.

252791287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71465.

The product of its digits is 141120, while the sum is 43.

The square root of 252791287 is about 15899.4115299907. The cubic root of 252791287 is about 632.2963871468.

The spelling of 252791287 in words is "two hundred fifty-two million, seven hundred ninety-one thousand, two hundred eighty-seven".