12577716 has 18 divisors (see below), whose sum is σ = 31793762. Its totient is φ = 4192560.

The previous prime is 12577687. The next prime is 12577727. The reversal of 12577716 is 61777521.

12577716 is a `hidden beast` number, since 12 + 577 + 71 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12574116 + 3600 = 3546^2 + 60^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 349381 = 12577716 / (1 + 2 + 5 + 7 + 7 + 7 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174655 + ... + 174726.

Almost surely, 2^12577716 is an apocalyptic number.

It is an amenable number.

12577716 is an abundant number, since it is smaller than the sum of its proper divisors (19216046).

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

12577716 is a wasteful number, since it uses less digits than its factorization.

12577716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349391 (or 349386 counting only the distinct ones).

The product of its digits is 20580, while the sum is 36.

The square root of 12577716 is about 3546.5075778856. The cubic root of 12577716 is about 232.5594159629.

It can be divided in two parts, 125 and 77716, that added together give a square (77841 = 279²).

The spelling of 12577716 in words is "twelve million, five hundred seventy-seven thousand, seven hundred sixteen".