113705721 has 32 divisors (see below), whose sum is σ = 176670720. Its totient is φ = 72140112.

The previous prime is 113705689. The next prime is 113705731. The reversal of 113705721 is 127507311.

It is a happy number.

It is not a de Polignac number, because 113705721 - 2⁵ = 113705689 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (113705731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175420 + ... + 176066.

It is an arithmetic number, because the mean of its divisors is an integer number (5520960).

Almost surely, 2^113705721 is an apocalyptic number.

It is an amenable number.

113705721 is a deficient number, since it is larger than the sum of its proper divisors (62964999).

113705721 is a wasteful number, since it uses less digits than its factorization.

113705721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 113705721 is about 10663.2884702609. The cubic root of 113705721 is about 484.4631761832.

The spelling of 113705721 in words is "one hundred thirteen million, seven hundred five thousand, seven hundred twenty-one".