12749761 has 2 divisors, whose sum is σ = 12749762. Its totient is φ = 12749760.

The previous prime is 12749753. The next prime is 12749767. The reversal of 12749761 is 16794721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10439361 + 2310400 = 3231^2 + 1520^2 .

It is a cyclic number.

It is not a de Polignac number, because 12749761 - 2³ = 12749753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12749761.

It is not a weakly prime, because it can be changed into another prime (12749767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6374880 + 6374881.

It is an arithmetic number, because the mean of its divisors is an integer number (6374881).

Almost surely, 2^12749761 is an apocalyptic number.

It is an amenable number.

12749761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12749761 is an equidigital number, since it uses as much as digits as its factorization.

12749761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 12749761 is about 3570.6807474206. The cubic root of 12749761 is about 233.6149766876.

The spelling of 12749761 in words is "twelve million, seven hundred forty-nine thousand, seven hundred sixty-one".