112021409 has 4 divisors (see below), whose sum is σ = 112317360. Its totient is φ = 111725460.

The previous prime is 112021391. The next prime is 112021411. The reversal of 112021409 is 904120211.

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.

It is a cyclic number.

It is not a de Polignac number, because 112021409 - 2¹⁶ = 111955873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112021439) 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, 147407 + ... + 148164.

It is an arithmetic number, because the mean of its divisors is an integer number (28079340).

Almost surely, 2^112021409 is an apocalyptic number.

It is an amenable number.

112021409 is a deficient number, since it is larger than the sum of its proper divisors (295951).

112021409 is an equidigital number, since it uses as much as digits as its factorization.

112021409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295950.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 112021409 is about 10584.0166761018. The cubic root of 112021409 is about 482.0591644114.

The spelling of 112021409 in words is "one hundred twelve million, twenty-one thousand, four hundred nine".