12705757 has 2 divisors, whose sum is σ = 12705758. Its totient is φ = 12705756.

The previous prime is 12705731. The next prime is 12705767. The reversal of 12705757 is 75750721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10458756 + 2247001 = 3234^2 + 1499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12705757 is a prime.

It is a super-2 number, since 2×12705757² = 322872521886098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12705767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352878 + 6352879.

It is an arithmetic number, because the mean of its divisors is an integer number (6352879).

Almost surely, 2^12705757 is an apocalyptic number.

It is an amenable number.

12705757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12705757 is an equidigital number, since it uses as much as digits as its factorization.

12705757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 12705757 is about 3564.5135713025. The cubic root of 12705757 is about 233.3459038579.

The spelling of 12705757 in words is "twelve million, seven hundred five thousand, seven hundred fifty-seven".