12090557 has 2 divisors, whose sum is σ = 12090558. Its totient is φ = 12090556.

The previous prime is 12090541. The next prime is 12090563. The reversal of 12090557 is 75509021.

12090557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6205081 + 5885476 = 2491^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 12090557 - 2⁴ = 12090541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12090857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6045278 + 6045279.

It is an arithmetic number, because the mean of its divisors is an integer number (6045279).

Almost surely, 2^12090557 is an apocalyptic number.

It is an amenable number.

12090557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12090557 is an equidigital number, since it uses as much as digits as its factorization.

12090557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 12090557 is about 3477.1478254454. The cubic root of 12090557 is about 229.5173052707.

Adding to 12090557 its reverse (75509021), we get a palindrome (87599578).

The spelling of 12090557 in words is "twelve million, ninety thousand, five hundred fifty-seven".