12639461 has 2 divisors, whose sum is σ = 12639462. Its totient is φ = 12639460.

The previous prime is 12639457. The next prime is 12639467. The reversal of 12639461 is 16493621.

12639461 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8375236 + 4264225 = 2894^2 + 2065^2 .

It is a cyclic number.

It is not a de Polignac number, because 12639461 - 2² = 12639457 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 (12639467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319730 + 6319731.

It is an arithmetic number, because the mean of its divisors is an integer number (6319731).

Almost surely, 2^12639461 is an apocalyptic number.

It is an amenable number.

12639461 is a deficient number, since it is larger than the sum of its proper divisors (1).

12639461 is an equidigital number, since it uses as much as digits as its factorization.

12639461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 12639461 is about 3555.2019633208. The cubic root of 12639461 is about 232.9393457769.

The spelling of 12639461 in words is "twelve million, six hundred thirty-nine thousand, four hundred sixty-one".