1113860721 has 32 divisors (see below), whose sum is σ = 1617960960. Its totient is φ = 679536000.

The previous prime is 1113860717. The next prime is 1113860743. The reversal of 1113860721 is 1270683111.

It is not a de Polignac number, because 1113860721 - 2² = 1113860717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1113860221) 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, 187446 + ... + 193296.

It is an arithmetic number, because the mean of its divisors is an integer number (50561280).

Almost surely, 2^1113860721 is an apocalyptic number.

It is an amenable number.

1113860721 is a deficient number, since it is larger than the sum of its proper divisors (504100239).

1113860721 is a wasteful number, since it uses less digits than its factorization.

1113860721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5997.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1113860721 is about 33374.5519969932. The cubic root of 1113860721 is about 1036.5978325878.

The spelling of 1113860721 in words is "one billion, one hundred thirteen million, eight hundred sixty thousand, seven hundred twenty-one".