7522561 has 4 divisors (see below), whose sum is σ = 7561732. Its totient is φ = 7483392.

The previous prime is 7522531. The next prime is 7522573. The reversal of 7522561 is 1652257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1652257 = 701 ⋅2357.

It can be written as a sum of positive squares in 2 ways, for example, as 1050625 + 6471936 = 1025^2 + 2544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7522561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7522531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19296 + ... + 19681.

It is an arithmetic number, because the mean of its divisors is an integer number (1890433).

Almost surely, 2^7522561 is an apocalyptic number.

It is an amenable number.

7522561 is a deficient number, since it is larger than the sum of its proper divisors (39171).

7522561 is a wasteful number, since it uses less digits than its factorization.

7522561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39170.

The product of its digits is 4200, while the sum is 28.

The square root of 7522561 is about 2742.7287507152. The cubic root of 7522561 is about 195.9394596446.

It can be divided in two parts, 752256 and 1, that added together give a palindrome (752257).

The spelling of 7522561 in words is "seven million, five hundred twenty-two thousand, five hundred sixty-one".