12784977 has 12 divisors (see below), whose sum is σ = 18603780. Its totient is φ = 8460288.

The previous prime is 12784951. The next prime is 12784991. The reversal of 12784977 is 77948721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3549456 + 9235521 = 1884^2 + 3039^2 .

It is not a de Polignac number, because 12784977 - 2¹² = 12780881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12783977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3952 + ... + 6417.

It is an arithmetic number, because the mean of its divisors is an integer number (1550315).

Almost surely, 2^12784977 is an apocalyptic number.

It is an amenable number.

12784977 is a deficient number, since it is larger than the sum of its proper divisors (5818803).

12784977 is a wasteful number, since it uses less digits than its factorization.

12784977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10512 (or 10509 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 12784977 is about 3575.6086195220. The cubic root of 12784977 is about 233.8298675670.

The spelling of 12784977 in words is "twelve million, seven hundred eighty-four thousand, nine hundred seventy-seven".