256245145 has 16 divisors (see below), whose sum is σ = 331716672. Its totient is φ = 188902080.

The previous prime is 256245109. The next prime is 256245161. The reversal of 256245145 is 541542652.

It is not a de Polignac number, because 256245145 - 2²³ = 247856537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256245145.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38730 + ... + 44860.

It is an arithmetic number, because the mean of its divisors is an integer number (20732292).

Almost surely, 2^256245145 is an apocalyptic number.

It is an amenable number.

256245145 is a deficient number, since it is larger than the sum of its proper divisors (75471527).

256245145 is a wasteful number, since it uses less digits than its factorization.

256245145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6792.

The product of its digits is 48000, while the sum is 34.

The square root of 256245145 is about 16007.6589481410. The cubic root of 256245145 is about 635.1630349970.

Adding to 256245145 its reverse (541542652), we get a palindrome (797787797).

The spelling of 256245145 in words is "two hundred fifty-six million, two hundred forty-five thousand, one hundred forty-five".