7504561 has 2 divisors, whose sum is σ = 7504562. Its totient is φ = 7504560.

The previous prime is 7504543. The next prime is 7504589. The reversal of 7504561 is 1654057.

7504561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (7504589) can be obtained adding 7504561 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7480225 + 24336 = 2735^2 + 156^2 .

It is an emirp because it is prime and its reverse (1654057) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7504561 - 2⁵ = 7504529 is a prime.

It is not a weakly prime, because it can be changed into another prime (7504501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3752280 + 3752281.

It is an arithmetic number, because the mean of its divisors is an integer number (3752281).

Almost surely, 2^7504561 is an apocalyptic number.

It is an amenable number.

7504561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7504561 is an equidigital number, since it uses as much as digits as its factorization.

7504561 is an evil number, because the sum of its binary digits is even.

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

The square root of 7504561 is about 2739.4453818246. The cubic root of 7504561 is about 195.7830533762.

The spelling of 7504561 in words is "seven million, five hundred four thousand, five hundred sixty-one".