12891190 has 32 divisors (see below), whose sum is σ = 25474176. Its totient is φ = 4667520.

The previous prime is 12891187. The next prime is 12891209. The reversal of 12891190 is 9119821.

It is a super-2 number, since 2×12891190² = 332365559232200, which contains 22 as substring.

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, 5955 + ... + 7825.

It is an arithmetic number, because the mean of its divisors is an integer number (796068).

Almost surely, 2^12891190 is an apocalyptic number.

12891190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12891190 is a deficient number, since it is larger than the sum of its proper divisors (12582986).

12891190 is a wasteful number, since it uses less digits than its factorization.

12891190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 12891190 is about 3590.4303363246. The cubic root of 12891190 is about 234.4756075331.

The spelling of 12891190 in words is "twelve million, eight hundred ninety-one thousand, one hundred ninety".