113139261 has 20 divisors (see below), whose sum is σ = 169884000. Its totient is φ = 75036456.

The previous prime is 113139251. The next prime is 113139263. The reversal of 113139261 is 162931311.

It is not a de Polignac number, because 113139261 - 2⁶ = 113139197 is a prime.

It is a super-2 number, since 2×113139261² = 25600984759252242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113139263) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12610 + ... + 19628.

It is an arithmetic number, because the mean of its divisors is an integer number (8494200).

Almost surely, 2^113139261 is an apocalyptic number.

It is an amenable number.

113139261 is a deficient number, since it is larger than the sum of its proper divisors (56744739).

113139261 is an equidigital number, since it uses as much as digits as its factorization.

113139261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230 (or 7221 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 113139261 is about 10636.6940822795. The cubic root of 113139261 is about 483.6573357754.

The spelling of 113139261 in words is "one hundred thirteen million, one hundred thirty-nine thousand, two hundred sixty-one".