251427 has 16 divisors (see below), whose sum is σ = 385920. Its totient is φ = 144000.

The previous prime is 251417. The next prime is 251429. The reversal of 251427 is 724152.

It is not a de Polignac number, because 251427 - 2⁸ = 251171 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 251427.

It is not an unprimeable number, because it can be changed into a prime (251429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427 + ... + 827.

It is an arithmetic number, because the mean of its divisors is an integer number (24120).

2²⁵¹⁴²⁷ is an apocalyptic number.

251427 is a deficient number, since it is larger than the sum of its proper divisors (134493).

251427 is a wasteful number, since it uses less digits than its factorization.

251427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434.

The product of its digits is 560, while the sum is 21.

The square root of 251427 is about 501.4249694620. The cubic root of 251427 is about 63.1156856498.

Adding to 251427 its reverse (724152), we get a palindrome (975579).

The spelling of 251427 in words is "two hundred fifty-one thousand, four hundred twenty-seven".