256492 has 6 divisors (see below), whose sum is σ = 448868. Its totient is φ = 128244.

The previous prime is 256489. The next prime is 256493. The reversal of 256492 is 294652.

It is a self number, because there is not a number n which added to its sum of digits gives 256492.

It is not an unprimeable number, because it can be changed into a prime (256493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32058 + ... + 32065.

2²⁵⁶⁴⁹² is an apocalyptic number.

It is an amenable number.

256492 is a deficient number, since it is larger than the sum of its proper divisors (192376).

256492 is a wasteful number, since it uses less digits than its factorization.

256492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64127 (or 64125 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 256492 is about 506.4503924374. The cubic root of 256492 is about 63.5366931997.

It can be divided in two parts, 25649 and 2, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 256492 in words is "two hundred fifty-six thousand, four hundred ninety-two".