256145361 has 8 divisors (see below), whose sum is σ = 341685024. Its totient is φ = 170684640.

The previous prime is 256145353. The next prime is 256145363. The reversal of 256145361 is 163541652.

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

It is not a de Polignac number, because 256145361 - 2³ = 256145353 is a prime.

It is a super-2 number, since 2×256145361² = 131220891923640642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256145363) 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, 11695 + ... + 25476.

It is an arithmetic number, because the mean of its divisors is an integer number (42710628).

Almost surely, 2^256145361 is an apocalyptic number.

It is an amenable number.

256145361 is a deficient number, since it is larger than the sum of its proper divisors (85539663).

256145361 is a wasteful number, since it uses less digits than its factorization.

256145361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39471.

The product of its digits is 21600, while the sum is 33.

The square root of 256145361 is about 16004.5418866021. The cubic root of 256145361 is about 635.0805783624.

The spelling of 256145361 in words is "two hundred fifty-six million, one hundred forty-five thousand, three hundred sixty-one".