12859921 has 8 divisors (see below), whose sum is σ = 13464000. Its totient is φ = 12259632.

The previous prime is 12859919. The next prime is 12859933. The reversal of 12859921 is 12995821.

12859921 = T₅₃ + T₅₄ + ... + T₄₂₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12859921 - 2¹ = 12859919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12859901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7830 + ... + 9328.

It is an arithmetic number, because the mean of its divisors is an integer number (1683000).

Almost surely, 2^12859921 is an apocalyptic number.

It is an amenable number.

12859921 is a deficient number, since it is larger than the sum of its proper divisors (604079).

12859921 is a wasteful number, since it uses less digits than its factorization.

12859921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895.

The product of its digits is 12960, while the sum is 37.

The square root of 12859921 is about 3586.0732005914. The cubic root of 12859921 is about 234.2858719122.

The spelling of 12859921 in words is "twelve million, eight hundred fifty-nine thousand, nine hundred twenty-one".