12142986 has 8 divisors (see below), whose sum is σ = 24285984. Its totient is φ = 4047660.

The previous prime is 12142969. The next prime is 12142997. The reversal of 12142986 is 68924121.

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

12142986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011910 + ... + 1011921.

It is an arithmetic number, because the mean of its divisors is an integer number (3035748).

Almost surely, 2^12142986 is an apocalyptic number.

12142986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12142986 is a wasteful number, since it uses less digits than its factorization.

12142986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023836.

The product of its digits is 6912, while the sum is 33.

The square root of 12142986 is about 3484.6787513342. The cubic root of 12142986 is about 229.8485833891.

The spelling of 12142986 in words is "twelve million, one hundred forty-two thousand, nine hundred eighty-six".