256137 has 8 divisors (see below), whose sum is σ = 390336. Its totient is φ = 146352.

The previous prime is 256133. The next prime is 256147. The reversal of 256137 is 731652.

256137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256137 - 2² = 256133 is a prime.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256137.

It is not an unprimeable number, because it can be changed into a prime (256133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6078 + ... + 6119.

It is an arithmetic number, because the mean of its divisors is an integer number (48792).

2²⁵⁶¹³⁷ is an apocalyptic number.

It is an amenable number.

256137 is a deficient number, since it is larger than the sum of its proper divisors (134199).

256137 is a wasteful number, since it uses less digits than its factorization.

256137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12207.

The product of its digits is 1260, while the sum is 24.

The square root of 256137 is about 506.0997925311. The cubic root of 256137 is about 63.5073668267.

Adding to 256137 its reverse (731652), we get a palindrome (987789).

It can be divided in two parts, 256 and 137, that added together give a palindrome (393).

The spelling of 256137 in words is "two hundred fifty-six thousand, one hundred thirty-seven".