112421809 has 2 divisors, whose sum is σ = 112421810. Its totient is φ = 112421808.

The previous prime is 112421807. The next prime is 112421821. The reversal of 112421809 is 908124211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111513600 + 908209 = 10560^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 112421809 - 2¹ = 112421807 is a prime.

Together with 112421807, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (112421807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56210904 + 56210905.

It is an arithmetic number, because the mean of its divisors is an integer number (56210905).

Almost surely, 2^112421809 is an apocalyptic number.

It is an amenable number.

112421809 is a deficient number, since it is larger than the sum of its proper divisors (1).

112421809 is an equidigital number, since it uses as much as digits as its factorization.

112421809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 112421809 is about 10602.9151180230. The cubic root of 112421809 is about 482.6328255219.

The spelling of 112421809 in words is "one hundred twelve million, four hundred twenty-one thousand, eight hundred nine".