245661256 has 8 divisors (see below), whose sum is σ = 460614870. Its totient is φ = 122830624.

The previous prime is 245661253. The next prime is 245661289. The reversal of 245661256 is 652166542.

245661256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 238208356 + 7452900 = 15434^2 + 2730^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (245661253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15353821 + ... + 15353836.

Almost surely, 2^245661256 is an apocalyptic number.

It is an amenable number.

245661256 is a deficient number, since it is larger than the sum of its proper divisors (214953614).

245661256 is a wasteful number, since it uses less digits than its factorization.

245661256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30707663 (or 30707659 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 245661256 is about 15673.5846569953. The cubic root of 245661256 is about 626.2949203571.

The spelling of 245661256 in words is "two hundred forty-five million, six hundred sixty-one thousand, two hundred fifty-six".