12154859 has 2 divisors, whose sum is σ = 12154860. Its totient is φ = 12154858.

The previous prime is 12154843. The next prime is 12154871. The reversal of 12154859 is 95845121.

It is a strong prime.

It is an emirp because it is prime and its reverse (95845121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12154859 - 2⁴ = 12154843 is a prime.

It is not a weakly prime, because it can be changed into another prime (12154159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077429 + 6077430.

It is an arithmetic number, because the mean of its divisors is an integer number (6077430).

Almost surely, 2^12154859 is an apocalyptic number.

12154859 is a deficient number, since it is larger than the sum of its proper divisors (1).

12154859 is an equidigital number, since it uses as much as digits as its factorization.

12154859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 35.

The square root of 12154859 is about 3486.3819354741. The cubic root of 12154859 is about 229.9234717039.

The spelling of 12154859 in words is "twelve million, one hundred fifty-four thousand, eight hundred fifty-nine".