251275 has 18 divisors (see below), whose sum is σ = 342860. Its totient is φ = 182160.

The previous prime is 251263. The next prime is 251287. The reversal of 251275 is 572152.

It is an interprime number because it is at equal distance from previous prime (251263) and next prime (251287).

It is a de Polignac number, because none of the positive numbers 2^k-251275 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10914 + ... + 10936.

2²⁵¹²⁷⁵ is an apocalyptic number.

251275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

251275 is a deficient number, since it is larger than the sum of its proper divisors (91585).

251275 is a wasteful number, since it uses less digits than its factorization.

251275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 47 counting only the distinct ones).

The product of its digits is 700, while the sum is 22.

The square root of 251275 is about 501.2733785072. The cubic root of 251275 is about 63.1029642395.

The spelling of 251275 in words is "two hundred fifty-one thousand, two hundred seventy-five".