391256 has 8 divisors (see below), whose sum is σ = 733620. Its totient is φ = 195624.

The previous prime is 391249. The next prime is 391273. The reversal of 391256 is 652193.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24446 + ... + 24461.

2³⁹¹²⁵⁶ is an apocalyptic number.

It is an amenable number.

391256 is a deficient number, since it is larger than the sum of its proper divisors (342364).

391256 is a wasteful number, since it uses less digits than its factorization.

391256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48913 (or 48909 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 391256 is about 625.5045963061. The cubic root of 391256 is about 73.1397834576.

It can be divided in two parts, 39 and 1256, that multiplied together give a palindrome (48984).

The spelling of 391256 in words is "three hundred ninety-one thousand, two hundred fifty-six".