12577121 has 2 divisors, whose sum is σ = 12577122. Its totient is φ = 12577120.

The previous prime is 12577111. The next prime is 12577129. The reversal of 12577121 is 12177521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12327121 + 250000 = 3511^2 + 500^2 .

It is an emirp because it is prime and its reverse (12177521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12577121 - 2¹⁰ = 12576097 is a prime.

It is not a weakly prime, because it can be changed into another prime (12577129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6288560 + 6288561.

It is an arithmetic number, because the mean of its divisors is an integer number (6288561).

Almost surely, 2^12577121 is an apocalyptic number.

It is an amenable number.

12577121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12577121 is an equidigital number, since it uses as much as digits as its factorization.

12577121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 980, while the sum is 26.

The square root of 12577121 is about 3546.4236915518. The cubic root of 12577121 is about 232.5557487620. Note that the first 3 decimals are identical.

The spelling of 12577121 in words is "twelve million, five hundred seventy-seven thousand, one hundred twenty-one".