12912990 has 16 divisors (see below), whose sum is σ = 30991248. Its totient is φ = 3443456.

The previous prime is 12912971. The next prime is 12913003. The reversal of 12912990 is 9921921.

It is a Curzon number.

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, 215187 + ... + 215246.

It is an arithmetic number, because the mean of its divisors is an integer number (1936953).

Almost surely, 2^12912990 is an apocalyptic number.

12912990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12912990 is an abundant number, since it is smaller than the sum of its proper divisors (18078258).

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

12912990 is a wasteful number, since it uses less digits than its factorization.

12912990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430443.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 12912990 is about 3593.4649017348. The cubic root of 12912990 is about 234.6077052317.

The spelling of 12912990 in words is "twelve million, nine hundred twelve thousand, nine hundred ninety".