12155579 has 2 divisors, whose sum is σ = 12155580. Its totient is φ = 12155578.

The previous prime is 12155567. The next prime is 12155581. The reversal of 12155579 is 97555121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12155579 - 2¹² = 12151483 is a prime.

Together with 12155581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12155509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077789 + 6077790.

It is an arithmetic number, because the mean of its divisors is an integer number (6077790).

Almost surely, 2^12155579 is an apocalyptic number.

12155579 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155579 is an equidigital number, since it uses as much as digits as its factorization.

12155579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 35.

The square root of 12155579 is about 3486.4851928554. The cubic root of 12155579 is about 229.9280114969.

The spelling of 12155579 in words is "twelve million, one hundred fifty-five thousand, five hundred seventy-nine".