12729426 has 16 divisors (see below), whose sum is σ = 25536000. Its totient is φ = 4230288.

The previous prime is 12729391. The next prime is 12729439. The reversal of 12729426 is 62492721.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946 + ... + 5133.

It is an arithmetic number, because the mean of its divisors is an integer number (1596000).

Almost surely, 2^12729426 is an apocalyptic number.

12729426 is an abundant number, since it is smaller than the sum of its proper divisors (12806574).

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

12729426 is a wasteful number, since it uses less digits than its factorization.

12729426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6433.

The product of its digits is 12096, while the sum is 33.

The square root of 12729426 is about 3567.8321148843. The cubic root of 12729426 is about 233.4907106093.

The spelling of 12729426 in words is "twelve million, seven hundred twenty-nine thousand, four hundred twenty-six".