12555757 has 2 divisors, whose sum is σ = 12555758. Its totient is φ = 12555756.

The previous prime is 12555749. The next prime is 12555779. The reversal of 12555757 is 75755521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10536516 + 2019241 = 3246^2 + 1421^2 .

It is an emirp because it is prime and its reverse (75755521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12555757 - 2³ = 12555749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12555737) by changing a digit.

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 as a sum of consecutive naturals, namely, 6277878 + 6277879.

It is an arithmetic number, because the mean of its divisors is an integer number (6277879).

Almost surely, 2^12555757 is an apocalyptic number.

It is an amenable number.

12555757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12555757 is an equidigital number, since it uses as much as digits as its factorization.

12555757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61250, while the sum is 37.

The square root of 12555757 is about 3543.4103629131. The cubic root of 12555757 is about 232.4239979741.

The spelling of 12555757 in words is "twelve million, five hundred fifty-five thousand, seven hundred fifty-seven".