12785761 has 2 divisors, whose sum is σ = 12785762. Its totient is φ = 12785760.

The previous prime is 12785753. The next prime is 12785767. The reversal of 12785761 is 16758721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 140625 = 3556^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 12785761 - 2³ = 12785753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12785761.

It is not a weakly prime, because it can be changed into another prime (12785767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6392880 + 6392881.

It is an arithmetic number, because the mean of its divisors is an integer number (6392881).

Almost surely, 2^12785761 is an apocalyptic number.

It is an amenable number.

12785761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12785761 is an equidigital number, since it uses as much as digits as its factorization.

12785761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 37.

The square root of 12785761 is about 3575.7182495269. The cubic root of 12785761 is about 233.8346471055.

The spelling of 12785761 in words is "twelve million, seven hundred eighty-five thousand, seven hundred sixty-one".