12757861 has 2 divisors, whose sum is σ = 12757862. Its totient is φ = 12757860.

The previous prime is 12757807. The next prime is 12757891. The reversal of 12757861 is 16875721.

12757861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 820836 = 3455^2 + 906^2 .

It is a cyclic number.

It is not a de Polignac number, because 12757861 - 2¹⁵ = 12725093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12757861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12757891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6378930 + 6378931.

It is an arithmetic number, because the mean of its divisors is an integer number (6378931).

Almost surely, 2^12757861 is an apocalyptic number.

It is an amenable number.

12757861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12757861 is an equidigital number, since it uses as much as digits as its factorization.

12757861 is an evil number, because the sum of its binary digits is even.

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

The square root of 12757861 is about 3571.8148048296. The cubic root of 12757861 is about 233.6644385488.

The spelling of 12757861 in words is "twelve million, seven hundred fifty-seven thousand, eight hundred sixty-one".