12540986 has 8 divisors (see below), whose sum is σ = 18876564. Its totient is φ = 6248800.

The previous prime is 12540973. The next prime is 12540989. The reversal of 12540986 is 68904521.

It can be written as a sum of positive squares in 2 ways, for example, as 12355225 + 185761 = 3515^2 + 431^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12540989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10115 + ... + 11286.

Almost surely, 2^12540986 is an apocalyptic number.

12540986 is a deficient number, since it is larger than the sum of its proper divisors (6335578).

12540986 is a wasteful number, since it uses less digits than its factorization.

12540986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21696.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 12540986 is about 3541.3254580736. The cubic root of 12540986 is about 232.3328184979.

The spelling of 12540986 in words is "twelve million, five hundred forty thousand, nine hundred eighty-six".