256274137 has 8 divisors (see below), whose sum is σ = 294143616. Its totient is φ = 218719392.

The previous prime is 256274113. The next prime is 256274141. The reversal of 256274137 is 731472652.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 256274137 - 2¹¹ = 256272089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256274096 and 256274105.

It is not an unprimeable number, because it can be changed into a prime (256274107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76933 + ... + 80194.

It is an arithmetic number, because the mean of its divisors is an integer number (36767952).

Almost surely, 2^256274137 is an apocalyptic number.

It is an amenable number.

256274137 is a deficient number, since it is larger than the sum of its proper divisors (37869479).

256274137 is a wasteful number, since it uses less digits than its factorization.

256274137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157367.

The product of its digits is 70560, while the sum is 37.

The square root of 256274137 is about 16008.5644890477. The cubic root of 256274137 is about 635.1869885595.

The spelling of 256274137 in words is "two hundred fifty-six million, two hundred seventy-four thousand, one hundred thirty-seven".