12759521 has 2 divisors, whose sum is σ = 12759522. Its totient is φ = 12759520.

The previous prime is 12759511. The next prime is 12759529. The reversal of 12759521 is 12595721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8614225 + 4145296 = 2935^2 + 2036^2 .

It is a cyclic number.

It is not a de Polignac number, because 12759521 - 2¹⁰ = 12758497 is a prime.

It is a super-2 number, since 2×12759521² = 325610752298882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12759529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6379760 + 6379761.

It is an arithmetic number, because the mean of its divisors is an integer number (6379761).

Almost surely, 2^12759521 is an apocalyptic number.

It is an amenable number.

12759521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12759521 is an equidigital number, since it uses as much as digits as its factorization.

12759521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 32.

The square root of 12759521 is about 3572.0471721409. The cubic root of 12759521 is about 233.6745725921.

The spelling of 12759521 in words is "twelve million, seven hundred fifty-nine thousand, five hundred twenty-one".