12912830 has 32 divisors (see below), whose sum is σ = 27483840. Its totient is φ = 4273920.

The previous prime is 12912773. The next prime is 12912847. The reversal of 12912830 is 3821921.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12912830.

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 15 ways as a sum of consecutive naturals, for example, 1151 + ... + 5210.

It is an arithmetic number, because the mean of its divisors is an integer number (858870).

Almost surely, 2^12912830 is an apocalyptic number.

12912830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12912830 is an abundant number, since it is smaller than the sum of its proper divisors (14571010).

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

12912830 is a wasteful number, since it uses less digits than its factorization.

12912830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6404.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12912830 is about 3593.4426390302. The cubic root of 12912830 is about 234.6067362491.

Subtracting from 12912830 its reverse (3821921), we obtain a palindrome (9090909).

The spelling of 12912830 in words is "twelve million, nine hundred twelve thousand, eight hundred thirty".