113421 has 16 divisors (see below), whose sum is σ = 188928. Its totient is φ = 58800.

The previous prime is 113417. The next prime is 113437. The reversal of 113421 is 124311.

It is a happy number.

It is not a de Polignac number, because 113421 - 2² = 113417 is a prime.

It is a Curzon number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 113397 and 113406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15 + ... + 476.

It is an arithmetic number, because the mean of its divisors is an integer number (11808).

2¹¹³⁴²¹ is an apocalyptic number.

113421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113421 is a deficient number, since it is larger than the sum of its proper divisors (75507).

113421 is a wasteful number, since it uses less digits than its factorization.

113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its digits is 24, while the sum is 12.

The square root of 113421 is about 336.7803438445. The cubic root of 113421 is about 48.4058470271.

Adding to 113421 its reverse (124311), we get a palindrome (237732).

The spelling of 113421 in words is "one hundred thirteen thousand, four hundred twenty-one".