113138421 has 8 divisors (see below), whose sum is σ = 164565024. Its totient is φ = 68568720.

The previous prime is 113138413. The next prime is 113138477. The reversal of 113138421 is 124831311.

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

It is not a de Polignac number, because 113138421 - 2³ = 113138413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113138391 and 113138400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113138321) 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, 1714186 + ... + 1714251.

It is an arithmetic number, because the mean of its divisors is an integer number (20570628).

Almost surely, 2^113138421 is an apocalyptic number.

113138421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113138421 is a deficient number, since it is larger than the sum of its proper divisors (51426603).

113138421 is a wasteful number, since it uses less digits than its factorization.

113138421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428451.

The product of its digits is 576, while the sum is 24.

The square root of 113138421 is about 10636.6545962535. The cubic root of 113138421 is about 483.6561388046.

Adding to 113138421 its reverse (124831311), we get a palindrome (237969732).

The spelling of 113138421 in words is "one hundred thirteen million, one hundred thirty-eight thousand, four hundred twenty-one".