12401686 has 16 divisors (see below), whose sum is σ = 20369808. Its totient is φ = 5616000.

The previous prime is 12401671. The next prime is 12401713. The reversal of 12401686 is 68610421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5986 + ... + 7786.

It is an arithmetic number, because the mean of its divisors is an integer number (1273113).

Almost surely, 2^12401686 is an apocalyptic number.

12401686 is a deficient number, since it is larger than the sum of its proper divisors (7968122).

12401686 is a wasteful number, since it uses less digits than its factorization.

12401686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 12401686 is about 3521.6027601080. The cubic root of 12401686 is about 231.4693952921.

It can be divided in two parts, 1240 and 1686, that added together give a triangular number (2926 = T₇₆).

The spelling of 12401686 in words is "twelve million, four hundred one thousand, six hundred eighty-six".