12991130 has 16 divisors (see below), whose sum is σ = 24190920. Its totient is φ = 5017152.

The previous prime is 12991127. The next prime is 12991141. The reversal of 12991130 is 3119921.

12991130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9369721 + 3621409 = 3061^2 + 1903^2 .

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 12991130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22109 + ... + 22688.

Almost surely, 2^12991130 is an apocalyptic number.

12991130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12991130 is a deficient number, since it is larger than the sum of its proper divisors (11199790).

12991130 is a wasteful number, since it uses less digits than its factorization.

12991130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44833.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 12991130 is about 3604.3210178895. The cubic root of 12991130 is about 235.0799788132.

The spelling of 12991130 in words is "twelve million, nine hundred ninety-one thousand, one hundred thirty".