12604591 has 2 divisors, whose sum is σ = 12604592. Its totient is φ = 12604590.

The previous prime is 12604577. The next prime is 12604597. The reversal of 12604591 is 19540621.

12604591 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12604591 - 2¹³ = 12596399 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 (12604597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6302295 + 6302296.

It is an arithmetic number, because the mean of its divisors is an integer number (6302296).

Almost surely, 2^12604591 is an apocalyptic number.

12604591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12604591 is an equidigital number, since it uses as much as digits as its factorization.

12604591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 12604591 is about 3550.2944948272. The cubic root of 12604591 is about 232.7249358942.

The spelling of 12604591 in words is "twelve million, six hundred four thousand, five hundred ninety-one".