113132421 has 24 divisors (see below), whose sum is σ = 168847224. Its totient is φ = 72938880.

The previous prime is 113132413. The next prime is 113132483. The reversal of 113132421 is 124231311.

113132421 is a `hidden beast` number, since 113 + 132 + 421 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12852225 + 100280196 = 3585^2 + 10014^2 .

It is not a de Polignac number, because 113132421 - 2³ = 113132413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113132394 and 113132403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113132401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59335 + ... + 61211.

It is an arithmetic number, because the mean of its divisors is an integer number (7035301).

Almost surely, 2^113132421 is an apocalyptic number.

It is an amenable number.

113132421 is a deficient number, since it is larger than the sum of its proper divisors (55714803).

113132421 is a wasteful number, since it uses less digits than its factorization.

113132421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101 (or 2098 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 113132421 is about 10636.3725489473. The cubic root of 113132421 is about 483.6475888410.

Adding to 113132421 its reverse (124231311), we get a palindrome (237363732).

The spelling of 113132421 in words is "one hundred thirteen million, one hundred thirty-two thousand, four hundred twenty-one".