12665461 has 2 divisors, whose sum is σ = 12665462. Its totient is φ = 12665460.

The previous prime is 12665449. The next prime is 12665467. The reversal of 12665461 is 16456621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10278436 + 2387025 = 3206^2 + 1545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12665461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12665467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332730 + 6332731.

It is an arithmetic number, because the mean of its divisors is an integer number (6332731).

Almost surely, 2^12665461 is an apocalyptic number.

It is an amenable number.

12665461 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665461 is an equidigital number, since it uses as much as digits as its factorization.

12665461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 12665461 is about 3558.8566984356. The cubic root of 12665461 is about 233.0989589899.

The spelling of 12665461 in words is "twelve million, six hundred sixty-five thousand, four hundred sixty-one".