113540021 has 8 divisors (see below), whose sum is σ = 129825024. Its totient is φ = 97271280.

The previous prime is 113540003. The next prime is 113540023. The reversal of 113540021 is 120045311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113540021 - 2²⁶ = 46431157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113540023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22436 + ... + 27026.

It is an arithmetic number, because the mean of its divisors is an integer number (16228128).

Almost surely, 2^113540021 is an apocalyptic number.

It is an amenable number.

113540021 is a deficient number, since it is larger than the sum of its proper divisors (16285003).

113540021 is an equidigital number, since it uses as much as digits as its factorization.

113540021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8131.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 113540021 is about 10655.5159893832. The cubic root of 113540021 is about 484.2277304683.

Adding to 113540021 its reverse (120045311), we get a palindrome (233585332).

The spelling of 113540021 in words is "one hundred thirteen million, five hundred forty thousand, twenty-one".