7522513 has 4 divisors (see below), whose sum is σ = 7781940. Its totient is φ = 7263088.

The previous prime is 7522469. The next prime is 7522519. The reversal of 7522513 is 3152257.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1896129 + 5626384 = 1377^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 7522513 - 2¹³ = 7514321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7522519) 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 in 3 ways as a sum of consecutive naturals, for example, 129670 + ... + 129727.

It is an arithmetic number, because the mean of its divisors is an integer number (1945485).

Almost surely, 2^7522513 is an apocalyptic number.

It is an amenable number.

7522513 is a deficient number, since it is larger than the sum of its proper divisors (259427).

7522513 is a wasteful number, since it uses less digits than its factorization.

7522513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259426.

The product of its digits is 2100, while the sum is 25.

The square root of 7522513 is about 2742.7200002917. The cubic root of 7522513 is about 195.9390428932.

The spelling of 7522513 in words is "seven million, five hundred twenty-two thousand, five hundred thirteen".