256420113 has 8 divisors (see below), whose sum is σ = 345278976. Its totient is φ = 169254000.

The previous prime is 256420091. The next prime is 256420139. The reversal of 256420113 is 311024652.

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

It is not a de Polignac number, because 256420113 - 2¹³ = 256411921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256420183) 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, 422833 + ... + 423438.

It is an arithmetic number, because the mean of its divisors is an integer number (43159872).

Almost surely, 2^256420113 is an apocalyptic number.

It is an amenable number.

256420113 is a deficient number, since it is larger than the sum of its proper divisors (88858863).

256420113 is a wasteful number, since it uses less digits than its factorization.

256420113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846375.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 256420113 is about 16013.1231494671. The cubic root of 256420113 is about 635.3075683644.

Adding to 256420113 its reverse (311024652), we get a palindrome (567444765).

The spelling of 256420113 in words is "two hundred fifty-six million, four hundred twenty thousand, one hundred thirteen".