12599861 has 2 divisors, whose sum is σ = 12599862. Its totient is φ = 12599860.

The previous prime is 12599843. The next prime is 12599911. The reversal of 12599861 is 16899521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11771761 + 828100 = 3431^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 12599861 - 2¹⁰ = 12598837 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12599801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6299930 + 6299931.

It is an arithmetic number, because the mean of its divisors is an integer number (6299931).

Almost surely, 2^12599861 is an apocalyptic number.

It is an amenable number.

12599861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12599861 is an equidigital number, since it uses as much as digits as its factorization.

12599861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 41.

The square root of 12599861 is about 3549.6282903989. The cubic root of 12599861 is about 232.6958214584.

The spelling of 12599861 in words is "twelve million, five hundred ninety-nine thousand, eight hundred sixty-one".