112640421 has 4 divisors (see below), whose sum is σ = 150187232. Its totient is φ = 75093612.

The previous prime is 112640401. The next prime is 112640459. The reversal of 112640421 is 124046211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124046211 = 3 ⋅41348737.

It is not a de Polignac number, because 112640421 - 2⁶ = 112640357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112640401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18773401 + ... + 18773406.

It is an arithmetic number, because the mean of its divisors is an integer number (37546808).

Almost surely, 2^112640421 is an apocalyptic number.

It is an amenable number.

112640421 is a deficient number, since it is larger than the sum of its proper divisors (37546811).

112640421 is an equidigital number, since it uses as much as digits as its factorization.

112640421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37546810.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 112640421 is about 10613.2191629119. The cubic root of 112640421 is about 482.9454606233.

Adding to 112640421 its reverse (124046211), we get a palindrome (236686632).

The spelling of 112640421 in words is "one hundred twelve million, six hundred forty thousand, four hundred twenty-one".