256424291 has 8 divisors (see below), whose sum is σ = 263932368. Its totient is φ = 248976000.

The previous prime is 256424279. The next prime is 256424299. The reversal of 256424291 is 192424652.

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 256424291 - 2⁶ = 256424227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256424299) 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, 6170 + ... + 23471.

It is an arithmetic number, because the mean of its divisors is an integer number (32991546).

Almost surely, 2^256424291 is an apocalyptic number.

256424291 is a deficient number, since it is larger than the sum of its proper divisors (7508077).

256424291 is a wasteful number, since it uses less digits than its factorization.

256424291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29893.

The product of its digits is 34560, while the sum is 35.

The square root of 256424291 is about 16013.2536044365. The cubic root of 256424291 is about 635.3110188225.

The spelling of 256424291 in words is "two hundred fifty-six million, four hundred twenty-four thousand, two hundred ninety-one".