12662861 has 2 divisors, whose sum is σ = 12662862. Its totient is φ = 12662860.

The previous prime is 12662833. The next prime is 12662869. The reversal of 12662861 is 16826621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9030025 + 3632836 = 3005^2 + 1906^2 .

It is a cyclic number.

It is not a de Polignac number, because 12662861 - 2¹⁰ = 12661837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12662869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6331430 + 6331431.

It is an arithmetic number, because the mean of its divisors is an integer number (6331431).

Almost surely, 2^12662861 is an apocalyptic number.

It is an amenable number.

12662861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12662861 is an equidigital number, since it uses as much as digits as its factorization.

12662861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 12662861 is about 3558.4913938353. The cubic root of 12662861 is about 233.0830075040.

The spelling of 12662861 in words is "twelve million, six hundred sixty-two thousand, eight hundred sixty-one".