12521519 has 2 divisors, whose sum is σ = 12521520. Its totient is φ = 12521518.

The previous prime is 12521507. The next prime is 12521543. The reversal of 12521519 is 91512521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12521519 - 2¹⁶ = 12455983 is a prime.

It is a super-2 number, since 2×12521519² = 313576876134722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12521569) 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, 6260759 + 6260760.

It is an arithmetic number, because the mean of its divisors is an integer number (6260760).

Almost surely, 2^12521519 is an apocalyptic number.

12521519 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521519 is an equidigital number, since it uses as much as digits as its factorization.

12521519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 26.

The square root of 12521519 is about 3538.5758434715. The cubic root of 12521519 is about 232.2125417985.

The spelling of 12521519 in words is "twelve million, five hundred twenty-one thousand, five hundred nineteen".