113256561 has 16 divisors (see below), whose sum is σ = 165731328. Its totient is φ = 68226000.

The previous prime is 113256551. The next prime is 113256569. The reversal of 113256561 is 165652311.

It is not a de Polignac number, because 113256561 - 2⁵ = 113256529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113256569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4765 + ... + 15786.

It is an arithmetic number, because the mean of its divisors is an integer number (10358208).

Almost surely, 2^113256561 is an apocalyptic number.

113256561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113256561 is a deficient number, since it is larger than the sum of its proper divisors (52474767).

113256561 is a wasteful number, since it uses less digits than its factorization.

113256561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20732.

The product of its digits is 5400, while the sum is 30.

The square root of 113256561 is about 10642.2065851025. The cubic root of 113256561 is about 483.8244260492.

The spelling of 113256561 in words is "one hundred thirteen million, two hundred fifty-six thousand, five hundred sixty-one".