12155057 has 2 divisors, whose sum is σ = 12155058. Its totient is φ = 12155056.

The previous prime is 12155029. The next prime is 12155081. The reversal of 12155057 is 75055121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6974881 + 5180176 = 2641^2 + 2276^2 .

It is an emirp because it is prime and its reverse (75055121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12155057 - 2⁶ = 12154993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12155257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077528 + 6077529.

It is an arithmetic number, because the mean of its divisors is an integer number (6077529).

Almost surely, 2^12155057 is an apocalyptic number.

It is an amenable number.

12155057 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155057 is an equidigital number, since it uses as much as digits as its factorization.

12155057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 12155057 is about 3486.4103315588. The cubic root of 12155057 is about 229.9247201648.

The spelling of 12155057 in words is "twelve million, one hundred fifty-five thousand, fifty-seven".