12987946 has 16 divisors (see below), whose sum is σ = 20210688. Its totient is φ = 6253200.

The previous prime is 12987917. The next prime is 12987967. The reversal of 12987946 is 64978921.

It is a junction number, because it is equal to n+sod(n) for n = 12987896 and 12987905.

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 7 ways as a sum of consecutive naturals, for example, 16416 + ... + 17188.

It is an arithmetic number, because the mean of its divisors is an integer number (1263168).

Almost surely, 2^12987946 is an apocalyptic number.

12987946 is a deficient number, since it is larger than the sum of its proper divisors (7222742).

12987946 is a wasteful number, since it uses less digits than its factorization.

12987946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077.

The product of its digits is 217728, while the sum is 46.

The square root of 12987946 is about 3603.8792987557. The cubic root of 12987946 is about 235.0607719695.

The spelling of 12987946 in words is "twelve million, nine hundred eighty-seven thousand, nine hundred forty-six".