12426840 has 48 divisors (see below), whose sum is σ = 40388400. Its totient is φ = 3313728.

The previous prime is 12426839. The next prime is 12426851. The reversal of 12426840 is 4862421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16900 + ... + 17619.

It is an arithmetic number, because the mean of its divisors is an integer number (841425).

Almost surely, 2^12426840 is an apocalyptic number.

12426840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12426840 is an abundant number, since it is smaller than the sum of its proper divisors (27961560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12426840 is a wasteful number, since it uses less digits than its factorization.

12426840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34536 (or 34529 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 12426840 is about 3525.1723362128. The cubic root of 12426840 is about 231.6257839514.

The spelling of 12426840 in words is "twelve million, four hundred twenty-six thousand, eight hundred forty".