15012521 has 2 divisors, whose sum is σ = 15012522. Its totient is φ = 15012520.

The previous prime is 15012443. The next prime is 15012541. The reversal of 15012521 is 12521051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12880921 + 2131600 = 3589^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 15012521 - 2¹⁰ = 15011497 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15012521.

It is not a weakly prime, because it can be changed into another prime (15012541) 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, 7506260 + 7506261.

It is an arithmetic number, because the mean of its divisors is an integer number (7506261).

Almost surely, 2^15012521 is an apocalyptic number.

It is an amenable number.

15012521 is a deficient number, since it is larger than the sum of its proper divisors (1).

15012521 is an equidigital number, since it uses as much as digits as its factorization.

15012521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 15012521 is about 3874.5994631704. The cubic root of 15012521 is about 246.6898093293.

Adding to 15012521 its reverse (12521051), we get a palindrome (27533572).

The spelling of 15012521 in words is "fifteen million, twelve thousand, five hundred twenty-one".