12977550 has 48 divisors (see below), whose sum is σ = 35764080. Its totient is φ = 3460320.

The previous prime is 12977539. The next prime is 12977597. The reversal of 12977550 is 5577921.

12977550 is a `hidden beast` number, since 12 + 97 + 7 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3457 + ... + 6156.

It is an arithmetic number, because the mean of its divisors is an integer number (745085).

Almost surely, 2^12977550 is an apocalyptic number.

12977550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12977550 is an abundant number, since it is smaller than the sum of its proper divisors (22786530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12977550 is a wasteful number, since it uses less digits than its factorization.

12977550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9634 (or 9623 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 12977550 is about 3602.4366753629. The cubic root of 12977550 is about 234.9980383117.

The spelling of 12977550 in words is "twelve million, nine hundred seventy-seven thousand, five hundred fifty".