12921142 has 16 divisors (see below), whose sum is σ = 21217392. Its totient is φ = 5865120.

The previous prime is 12921137. The next prime is 12921163. The reversal of 12921142 is 24112921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2488 + ... + 5659.

It is an arithmetic number, because the mean of its divisors is an integer number (1326087).

Almost surely, 2^12921142 is an apocalyptic number.

12921142 is a deficient number, since it is larger than the sum of its proper divisors (8296250).

12921142 is a wasteful number, since it uses less digits than its factorization.

12921142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8223.

The product of its digits is 288, while the sum is 22.

The square root of 12921142 is about 3594.5990040615. The cubic root of 12921142 is about 234.6570643059.

The spelling of 12921142 in words is "twelve million, nine hundred twenty-one thousand, one hundred forty-two".