12640601 has 2 divisors, whose sum is σ = 12640602. Its totient is φ = 12640600.

The previous prime is 12640561. The next prime is 12640609. The reversal of 12640601 is 10604621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11397376 + 1243225 = 3376^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 12640601 - 2¹⁰ = 12639577 is a prime.

It is not a weakly prime, because it can be changed into another prime (12640609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320300 + 6320301.

It is an arithmetic number, because the mean of its divisors is an integer number (6320301).

Almost surely, 2^12640601 is an apocalyptic number.

It is an amenable number.

12640601 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640601 is an equidigital number, since it uses as much as digits as its factorization.

12640601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12640601 is about 3555.3622881501. The cubic root of 12640601 is about 232.9463487884.

The spelling of 12640601 in words is "twelve million, six hundred forty thousand, six hundred one".