112840421 has 4 divisors (see below), whose sum is σ = 116731500. Its totient is φ = 108949344.

The previous prime is 112840309. The next prime is 112840447. The reversal of 112840421 is 124048211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80748196 + 32092225 = 8986^2 + 5665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112840421 is a prime.

It is a super-2 number, since 2×112840421² = 25465921222914482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112840451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1945496 + ... + 1945553.

It is an arithmetic number, because the mean of its divisors is an integer number (29182875).

Almost surely, 2^112840421 is an apocalyptic number.

It is an amenable number.

112840421 is a deficient number, since it is larger than the sum of its proper divisors (3891079).

112840421 is an equidigital number, since it uses as much as digits as its factorization.

112840421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891078.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 112840421 is about 10622.6371961015. The cubic root of 112840421 is about 483.2311247480.

Adding to 112840421 its reverse (124048211), we get a palindrome (236888632).

The spelling of 112840421 in words is "one hundred twelve million, eight hundred forty thousand, four hundred twenty-one".