256122249 has 8 divisors (see below), whose sum is σ = 341605440. Its totient is φ = 170693616.

The previous prime is 256122247. The next prime is 256122257. The reversal of 256122249 is 942221652.

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

It is not a de Polignac number, because 256122249 - 2¹ = 256122247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256122247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1014 + ... + 22655.

It is an arithmetic number, because the mean of its divisors is an integer number (42700680).

Almost surely, 2^256122249 is an apocalyptic number.

It is an amenable number.

256122249 is a deficient number, since it is larger than the sum of its proper divisors (85483191).

256122249 is a wasteful number, since it uses less digits than its factorization.

256122249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27279.

The product of its digits is 17280, while the sum is 33.

The square root of 256122249 is about 16003.8198252792. The cubic root of 256122249 is about 635.0614766777.

The spelling of 256122249 in words is "two hundred fifty-six million, one hundred twenty-two thousand, two hundred forty-nine".