7521013 has 2 divisors, whose sum is σ = 7521014. Its totient is φ = 7521012.

The previous prime is 7520993. The next prime is 7521049. The reversal of 7521013 is 3101257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5189284 + 2331729 = 2278^2 + 1527^2 .

It is an emirp because it is prime and its reverse (3101257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7521013 - 2⁹ = 7520501 is a prime.

7521013 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7521053) 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, 3760506 + 3760507.

It is an arithmetic number, because the mean of its divisors is an integer number (3760507).

Almost surely, 2^7521013 is an apocalyptic number.

It is an amenable number.

7521013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7521013 is an equidigital number, since it uses as much as digits as its factorization.

7521013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 7521013 is about 2742.4465354862. The cubic root of 7521013 is about 195.9260185177.

The spelling of 7521013 in words is "seven million, five hundred twenty-one thousand, thirteen".