256072245 has 64 divisors (see below), whose sum is σ = 497000448. Its totient is φ = 110880000.

The previous prime is 256072231. The next prime is 256072249. The reversal of 256072245 is 542270652.

It is not a de Polignac number, because 256072245 - 2⁸ = 256071989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256072249) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64570 + ... + 68420.

It is an arithmetic number, because the mean of its divisors is an integer number (7765632).

Almost surely, 2^256072245 is an apocalyptic number.

It is an amenable number.

256072245 is a deficient number, since it is larger than the sum of its proper divisors (240928203).

256072245 is a wasteful number, since it uses less digits than its factorization.

256072245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 256072245 is about 16002.2574969909. The cubic root of 256072245 is about 635.0201452678.

The spelling of 256072245 in words is "two hundred fifty-six million, seventy-two thousand, two hundred forty-five".