12921854 has 16 divisors (see below), whose sum is σ = 21828096. Its totient is φ = 5683800.

The previous prime is 12921833. The next prime is 12921863. The reversal of 12921854 is 45812921.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12921854.

It is a congruent number.

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, 8792 + ... + 10155.

It is an arithmetic number, because the mean of its divisors is an integer number (1364256).

Almost surely, 2^12921854 is an apocalyptic number.

12921854 is a deficient number, since it is larger than the sum of its proper divisors (8906242).

12921854 is a wasteful number, since it uses less digits than its factorization.

12921854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18991.

The product of its digits is 5760, while the sum is 32.

The square root of 12921854 is about 3594.6980401697. The cubic root of 12921854 is about 234.6613743677.

The spelling of 12921854 in words is "twelve million, nine hundred twenty-one thousand, eight hundred fifty-four".