12601986 has 16 divisors (see below), whose sum is σ = 25428384. Its totient is φ = 4163264.

The previous prime is 12601961. The next prime is 12601991. The reversal of 12601986 is 68910621.

It is a super-2 number, since 2×12601986² = 317620102288392, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8616 + ... + 9971.

It is an arithmetic number, because the mean of its divisors is an integer number (1589274).

Almost surely, 2^12601986 is an apocalyptic number.

12601986 is an abundant number, since it is smaller than the sum of its proper divisors (12826398).

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

12601986 is a wasteful number, since it uses less digits than its factorization.

12601986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18705.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 12601986 is about 3549.9276048956. The cubic root of 12601986 is about 232.7089023123.

The spelling of 12601986 in words is "twelve million, six hundred one thousand, nine hundred eighty-six".