12555577 has 2 divisors, whose sum is σ = 12555578. Its totient is φ = 12555576.

The previous prime is 12555551. The next prime is 12555581. The reversal of 12555577 is 77555521.

It is a happy number.

12555577 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., 12467961 + 87616 = 3531^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 12555577 - 2¹¹ = 12553529 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (12555547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6277788 + 6277789.

It is an arithmetic number, because the mean of its divisors is an integer number (6277789).

Almost surely, 2^12555577 is an apocalyptic number.

It is an amenable number.

12555577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12555577 is an equidigital number, since it uses as much as digits as its factorization.

12555577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61250, while the sum is 37.

The square root of 12555577 is about 3543.3849635624. The cubic root of 12555577 is about 232.4228872879.

The spelling of 12555577 in words is "twelve million, five hundred fifty-five thousand, five hundred seventy-seven".