12977842 has 8 divisors (see below), whose sum is σ = 20313216. Its totient is φ = 6206772.

The previous prime is 12977837. The next prime is 12977843. The reversal of 12977842 is 24877921.

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 = 12977795 and 12977804.

It is not an unprimeable number, because it can be changed into a prime (12977843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141018 + ... + 141109.

It is an arithmetic number, because the mean of its divisors is an integer number (2539152).

Almost surely, 2^12977842 is an apocalyptic number.

12977842 is a deficient number, since it is larger than the sum of its proper divisors (7335374).

12977842 is a wasteful number, since it uses less digits than its factorization.

12977842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282152.

The product of its digits is 56448, while the sum is 40.

The square root of 12977842 is about 3602.4772032589. The cubic root of 12977842 is about 234.9998008147. Note that the first 3 decimals are identical.

The spelling of 12977842 in words is "twelve million, nine hundred seventy-seven thousand, eight hundred forty-two".