113242138 has 4 divisors (see below), whose sum is σ = 169863210. Its totient is φ = 56621068.

The previous prime is 113242121. The next prime is 113242141. The reversal of 113242138 is 831242311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 105329169 + 7912969 = 10263^2 + 2813^2 .

It is a super-2 number, since 2×113242138² = 25647563637622088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28310533 + ... + 28310536.

Almost surely, 2^113242138 is an apocalyptic number.

113242138 is a deficient number, since it is larger than the sum of its proper divisors (56621072).

113242138 is an equidigital number, since it uses as much as digits as its factorization.

113242138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56621071.

The product of its digits is 1152, while the sum is 25.

The square root of 113242138 is about 10641.5289315023. The cubic root of 113242138 is about 483.8038871480.

Adding to 113242138 its reverse (831242311), we get a palindrome (944484449).

The spelling of 113242138 in words is "one hundred thirteen million, two hundred forty-two thousand, one hundred thirty-eight".