12977642 has 8 divisors (see below), whose sum is σ = 19481796. Its totient is φ = 6483712.

The previous prime is 12977617. The next prime is 12977651. The reversal of 12977642 is 24677921.

It can be written as a sum of positive squares in 2 ways, for example, as 12880921 + 96721 = 3589^2 + 311^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12977596 and 12977605.

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, 3338 + ... + 6090.

Almost surely, 2^12977642 is an apocalyptic number.

12977642 is a deficient number, since it is larger than the sum of its proper divisors (6504154).

12977642 is a wasteful number, since it uses less digits than its factorization.

12977642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112.

The product of its digits is 42336, while the sum is 38.

The square root of 12977642 is about 3602.4494444752. The cubic root of 12977642 is about 234.9985936237.

The spelling of 12977642 in words is "twelve million, nine hundred seventy-seven thousand, six hundred forty-two".