12521412539 has 2 divisors, whose sum is σ = 12521412540. Its totient is φ = 12521412538.

The previous prime is 12521412521. The next prime is 12521412613. The reversal of 12521412539 is 93521412521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12521412539 - 2³² = 8226445243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12521412499 and 12521412508.

It is not a weakly prime, because it can be changed into another prime (12521412439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260706269 + 6260706270.

It is an arithmetic number, because the mean of its divisors is an integer number (6260706270).

Almost surely, 2^12521412539 is an apocalyptic number.

12521412539 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521412539 is an equidigital number, since it uses as much as digits as its factorization.

12521412539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The spelling of 12521412539 in words is "twelve billion, five hundred twenty-one million, four hundred twelve thousand, five hundred thirty-nine".