12521479 has 2 divisors, whose sum is σ = 12521480. Its totient is φ = 12521478.

The previous prime is 12521473. The next prime is 12521501. The reversal of 12521479 is 97412521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12521479 - 2⁵ = 12521447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12521479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12521473) 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, 6260739 + 6260740.

It is an arithmetic number, because the mean of its divisors is an integer number (6260740).

Almost surely, 2^12521479 is an apocalyptic number.

12521479 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521479 is an equidigital number, since it uses as much as digits as its factorization.

12521479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 12521479 is about 3538.5701914756. The cubic root of 12521479 is about 232.2122945305.

The spelling of 12521479 in words is "twelve million, five hundred twenty-one thousand, four hundred seventy-nine".