12920999 has 16 divisors (see below), whose sum is σ = 16063488. Its totient is φ = 10120032.

The previous prime is 12920993. The next prime is 12921001. The reversal of 12920999 is 99902921.

It is not a de Polignac number, because 12920999 - 2¹⁶ = 12855463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12920993) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9074 + ... + 10400.

It is an arithmetic number, because the mean of its divisors is an integer number (1003968).

Almost surely, 2^12920999 is an apocalyptic number.

12920999 is a deficient number, since it is larger than the sum of its proper divisors (3142489).

12920999 is a wasteful number, since it uses less digits than its factorization.

12920999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 12920999 is about 3594.5791130534. The cubic root of 12920999 is about 234.6561986424.

The spelling of 12920999 in words is "twelve million, nine hundred twenty thousand, nine hundred ninety-nine".