251072 has 14 divisors (see below), whose sum is σ = 498348. Its totient is φ = 125504.

The previous prime is 251071. The next prime is 251081. The reversal of 251072 is 270152.

It is a self number, because there is not a number n which added to its sum of digits gives 251072.

It is not an unprimeable number, because it can be changed into a prime (251071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1898 + ... + 2025.

2²⁵¹⁰⁷² is an apocalyptic number.

It is an amenable number.

251072 is a deficient number, since it is larger than the sum of its proper divisors (247276).

251072 is an equidigital number, since it uses as much as digits as its factorization.

251072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935 (or 3925 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 251072 is about 501.0708532733. The cubic root of 251072 is about 63.0859664576.

The spelling of 251072 in words is "two hundred fifty-one thousand, seventy-two".