12451986 has 24 divisors (see below), whose sum is σ = 27104220. Its totient is φ = 4131456.

The previous prime is 12451963. The next prime is 12451997. The reversal of 12451986 is 68915421.

It can be written as a sum of positive squares in 2 ways, for example, as 9455625 + 2996361 = 3075^2 + 1731^2 .

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 12451986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2710 + ... + 5678.

Almost surely, 2^12451986 is an apocalyptic number.

12451986 is an abundant number, since it is smaller than the sum of its proper divisors (14652234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12451986 is a wasteful number, since it uses less digits than its factorization.

12451986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210 (or 3207 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12451986 is about 3528.7371678832. The cubic root of 12451986 is about 231.7819120775.

The spelling of 12451986 in words is "twelve million, four hundred fifty-one thousand, nine hundred eighty-six".