7245509 has 2 divisors, whose sum is σ = 7245510. Its totient is φ = 7245508.

The previous prime is 7245503. The next prime is 7245521. The reversal of 7245509 is 9055427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 9409 = 2690^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 7245509 - 2²⁰ = 6196933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7245503) 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, 3622754 + 3622755.

It is an arithmetic number, because the mean of its divisors is an integer number (3622755).

Almost surely, 2^7245509 is an apocalyptic number.

It is an amenable number.

7245509 is a deficient number, since it is larger than the sum of its proper divisors (1).

7245509 is an equidigital number, since it uses as much as digits as its factorization.

7245509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 7245509 is about 2691.7483166151. The cubic root of 7245509 is about 193.5038603124.

The spelling of 7245509 in words is "seven million, two hundred forty-five thousand, five hundred nine".