257026 has 16 divisors (see below), whose sum is σ = 480960. Its totient is φ = 100080.

The previous prime is 257017. The next prime is 257053. The reversal of 257026 is 620752.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 256988 and 257006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681 + ... + 988.

It is an arithmetic number, because the mean of its divisors is an integer number (30060).

2²⁵⁷⁰²⁶ is an apocalyptic number.

257026 is a deficient number, since it is larger than the sum of its proper divisors (223934).

257026 is a wasteful number, since it uses less digits than its factorization.

257026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 257026 is about 506.9773170468. The cubic root of 257026 is about 63.5807557509.

Adding to 257026 its reverse (620752), we get a palindrome (877778).

The spelling of 257026 in words is "two hundred fifty-seven thousand, twenty-six".