12651986 has 8 divisors (see below), whose sum is σ = 19976880. Its totient is φ = 5993028.

The previous prime is 12651983. The next prime is 12651997. The reversal of 12651986 is 68915621.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 332947 = 12651986 / (1 + 2 + 6 + 5 + 1 + 9 + 8 + 6).

It is not an unprimeable number, because it can be changed into a prime (12651983) 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, 166436 + ... + 166511.

It is an arithmetic number, because the mean of its divisors is an integer number (2497110).

Almost surely, 2^12651986 is an apocalyptic number.

12651986 is a deficient number, since it is larger than the sum of its proper divisors (7324894).

12651986 is a wasteful number, since it uses less digits than its factorization.

12651986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332968.

The product of its digits is 25920, while the sum is 38.

The square root of 12651986 is about 3556.9630304517. The cubic root of 12651986 is about 233.0162636698.

The spelling of 12651986 in words is "twelve million, six hundred fifty-one thousand, nine hundred eighty-six".