7520561 has 8 divisors (see below), whose sum is σ = 7996800. Its totient is φ = 7052400.

The previous prime is 7520551. The next prime is 7520567. The reversal of 7520561 is 1650257.

7520561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7520561 - 2¹⁸ = 7258417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7520561.

It is not an unprimeable number, because it can be changed into a prime (7520567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41 + ... + 3878.

It is an arithmetic number, because the mean of its divisors is an integer number (999600).

Almost surely, 2^7520561 is an apocalyptic number.

It is an amenable number.

7520561 is a deficient number, since it is larger than the sum of its proper divisors (476239).

7520561 is a wasteful number, since it uses less digits than its factorization.

7520561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 7520561 is about 2742.3641260781. The cubic root of 7520561 is about 195.9220934997.

The spelling of 7520561 in words is "seven million, five hundred twenty thousand, five hundred sixty-one".