7056509 has 2 divisors, whose sum is σ = 7056510. Its totient is φ = 7056508.

The previous prime is 7056503. The next prime is 7056521. The reversal of 7056509 is 9056507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6775609 + 280900 = 2603^2 + 530^2 .

It is an emirp because it is prime and its reverse (9056507) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7056509 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7056503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3528254 + 3528255.

It is an arithmetic number, because the mean of its divisors is an integer number (3528255).

Almost surely, 2^7056509 is an apocalyptic number.

It is an amenable number.

7056509 is a deficient number, since it is larger than the sum of its proper divisors (1).

7056509 is an equidigital number, since it uses as much as digits as its factorization.

7056509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 7056509 is about 2656.4090422975. The cubic root of 7056509 is about 191.8064908716.

The spelling of 7056509 in words is "seven million, fifty-six thousand, five hundred nine".