12520777 has 2 divisors, whose sum is σ = 12520778. Its totient is φ = 12520776.

The previous prime is 12520757. The next prime is 12520793. The reversal of 12520777 is 77702521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9461776 + 3059001 = 3076^2 + 1749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12520777 is a prime.

It is not a weakly prime, because it can be changed into another prime (12520747) 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, 6260388 + 6260389.

It is an arithmetic number, because the mean of its divisors is an integer number (6260389).

Almost surely, 2^12520777 is an apocalyptic number.

It is an amenable number.

12520777 is a deficient number, since it is larger than the sum of its proper divisors (1).

12520777 is an equidigital number, since it uses as much as digits as its factorization.

12520777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 12520777 is about 3538.4709974790. The cubic root of 12520777 is about 232.2079548920.

It can be divided in two parts, 125 and 20777, that added together give a palindrome (20902).

The spelling of 12520777 in words is "twelve million, five hundred twenty thousand, seven hundred seventy-seven".