12015559 has 2 divisors, whose sum is σ = 12015560. Its totient is φ = 12015558.

The previous prime is 12015557. The next prime is 12015571. The reversal of 12015559 is 95551021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12015559 - 2¹ = 12015557 is a prime.

Together with 12015557, it forms a pair of twin primes.

It is equal to p₇₈₉₀₁₃ and since 12015559 and 789013 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12015551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6007779 + 6007780.

It is an arithmetic number, because the mean of its divisors is an integer number (6007780).

Almost surely, 2^12015559 is an apocalyptic number.

12015559 is a deficient number, since it is larger than the sum of its proper divisors (1).

12015559 is an equidigital number, since it uses as much as digits as its factorization.

12015559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 12015559 is about 3466.3466358690. The cubic root of 12015559 is about 229.0417536040.

The spelling of 12015559 in words is "twelve million, fifteen thousand, five hundred fifty-nine".