12921426 has 24 divisors (see below), whose sum is σ = 31996224. Its totient is φ = 3691800.

The previous prime is 12921407. The next prime is 12921449. The reversal of 12921426 is 62412921.

It is a self number, because there is not a number n which added to its sum of digits gives 12921426.

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, 51150 + ... + 51401.

It is an arithmetic number, because the mean of its divisors is an integer number (1333176).

Almost surely, 2^12921426 is an apocalyptic number.

12921426 is an abundant number, since it is smaller than the sum of its proper divisors (19074798).

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

12921426 is a wasteful number, since it uses less digits than its factorization.

12921426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102566 (or 102563 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 12921426 is about 3594.6385075554. The cubic root of 12921426 is about 234.6587835068.

The spelling of 12921426 in words is "twelve million, nine hundred twenty-one thousand, four hundred twenty-six".