12907557 has 12 divisors (see below), whose sum is σ = 20078604. Its totient is φ = 7943040.

The previous prime is 12907553. The next prime is 12907571. The reversal of 12907557 is 75570921.

12907557 is a `hidden beast` number, since 12 + 90 + 7 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5503716 + 7403841 = 2346^2 + 2721^2 .

It is not a de Polignac number, because 12907557 - 2² = 12907553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12907553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55044 + ... + 55277.

It is an arithmetic number, because the mean of its divisors is an integer number (1673217).

Almost surely, 2^12907557 is an apocalyptic number.

It is an amenable number.

12907557 is a deficient number, since it is larger than the sum of its proper divisors (7171047).

12907557 is a wasteful number, since it uses less digits than its factorization.

12907557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110340 (or 110337 counting only the distinct ones).

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

The square root of 12907557 is about 3592.7088665796. The cubic root of 12907557 is about 234.5747977366.

The spelling of 12907557 in words is "twelve million, nine hundred seven thousand, five hundred fifty-seven".