113451921 has 20 divisors (see below), whose sum is σ = 184886064. Its totient is φ = 68758200.

The previous prime is 113451917. The next prime is 113451929. The reversal of 113451921 is 129154311.

It is a happy number.

It is not a de Polignac number, because 113451921 - 2² = 113451917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (113451929) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 62775 + ... + 64556.

Almost surely, 2^113451921 is an apocalyptic number.

113451921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113451921 is a deficient number, since it is larger than the sum of its proper divisors (71434143).

113451921 is a wasteful number, since it uses less digits than its factorization.

113451921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127354 (or 127345 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 113451921 is about 10651.3811780445. The cubic root of 113451921 is about 484.1024545190.

The spelling of 113451921 in words is "one hundred thirteen million, four hundred fifty-one thousand, nine hundred twenty-one".