12979642 has 16 divisors (see below), whose sum is σ = 21282912. Its totient is φ = 5900400.

The previous prime is 12979601. The next prime is 12979643. The reversal of 12979642 is 24697921.

12979642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12979642² = 336942212896328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12979595 and 12979604.

It is not an unprimeable number, because it can be changed into a prime (12979643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1984 + ... + 5467.

It is an arithmetic number, because the mean of its divisors is an integer number (1330182).

Almost surely, 2^12979642 is an apocalyptic number.

12979642 is a deficient number, since it is larger than the sum of its proper divisors (8303270).

12979642 is a wasteful number, since it uses less digits than its factorization.

12979642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7533.

The product of its digits is 54432, while the sum is 40.

The square root of 12979642 is about 3602.7270226871. The cubic root of 12979642 is about 235.0106649755.

The spelling of 12979642 in words is "twelve million, nine hundred seventy-nine thousand, six hundred forty-two".