12720511 has 2 divisors, whose sum is σ = 12720512. Its totient is φ = 12720510.

The previous prime is 12720479. The next prime is 12720529. The reversal of 12720511 is 11502721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12720511 - 2⁵ = 12720479 is a prime.

It is a super-2 number, since 2×12720511² = 323622800202242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12720581) 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, 6360255 + 6360256.

It is an arithmetic number, because the mean of its divisors is an integer number (6360256).

Almost surely, 2^12720511 is an apocalyptic number.

12720511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12720511 is an equidigital number, since it uses as much as digits as its factorization.

12720511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 12720511 is about 3566.5825379486. The cubic root of 12720511 is about 233.4361898002.

It can be divided in two parts, 12720 and 511, that added together give a palindrome (13231).

The spelling of 12720511 in words is "twelve million, seven hundred twenty thousand, five hundred eleven".