257427 has 6 divisors (see below), whose sum is σ = 371852. Its totient is φ = 171612.

The previous prime is 257407. The next prime is 257437. The reversal of 257427 is 724752.

It is not a de Polignac number, because 257427 - 2⁸ = 257171 is a prime.

It is a d-powerful number, because it can be written as 2¹² + 5⁴ + 4⁵ + 7⁶ + 2¹⁴ + 7⁶ .

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 257427.

It is not an unprimeable number, because it can be changed into a prime (257407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14293 + ... + 14310.

2²⁵⁷⁴²⁷ is an apocalyptic number.

257427 is a deficient number, since it is larger than the sum of its proper divisors (114425).

257427 is a wasteful number, since it uses less digits than its factorization.

257427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28609 (or 28606 counting only the distinct ones).

The product of its digits is 3920, while the sum is 27.

The square root of 257427 is about 507.3726441187. The cubic root of 257427 is about 63.6138038152.

It can be divided in two parts, 2574 and 27, that added together give a square (2601 = 51²).

The spelling of 257427 in words is "two hundred fifty-seven thousand, four hundred twenty-seven".