12486991 has 8 divisors (see below), whose sum is σ = 13826304. Its totient is φ = 11181720.

The previous prime is 12486923. The next prime is 12486997. The reversal of 12486991 is 19968421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12486991 - 2⁷ = 12486863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12486997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7735 + ... + 9208.

It is an arithmetic number, because the mean of its divisors is an integer number (1728288).

Almost surely, 2^12486991 is an apocalyptic number.

12486991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12486991 is a deficient number, since it is larger than the sum of its proper divisors (1339313).

12486991 is a wasteful number, since it uses less digits than its factorization.

12486991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17021.

The product of its digits is 31104, while the sum is 40.

The square root of 12486991 is about 3533.6936765939. The cubic root of 12486991 is about 231.9989038295.

The spelling of 12486991 in words is "twelve million, four hundred eighty-six thousand, nine hundred ninety-one".