12487977 has 12 divisors (see below), whose sum is σ = 18293184. Its totient is φ = 8207640.

The previous prime is 12487973. The next prime is 12488023. The reversal of 12487977 is 77978421.

It is a happy number.

It is not a de Polignac number, because 12487977 - 2² = 12487973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12487973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9133 + ... + 10410.

It is an arithmetic number, because the mean of its divisors is an integer number (1524432).

Almost surely, 2^12487977 is an apocalyptic number.

It is an amenable number.

12487977 is a deficient number, since it is larger than the sum of its proper divisors (5805207).

12487977 is a wasteful number, since it uses less digits than its factorization.

12487977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19620 (or 19617 counting only the distinct ones).

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

The square root of 12487977 is about 3533.8331879137. The cubic root of 12487977 is about 232.0050100484.

The spelling of 12487977 in words is "twelve million, four hundred eighty-seven thousand, nine hundred seventy-seven".