2815009 has 2 divisors, whose sum is σ = 2815010. Its totient is φ = 2815008.

The previous prime is 2815003. The next prime is 2815049. The reversal of 2815009 is 9005182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2712609 + 102400 = 1647^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2815009 - 2⁷ = 2814881 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2815003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1407504 + 1407505.

It is an arithmetic number, because the mean of its divisors is an integer number (1407505).

2^2815009 is an apocalyptic number.

It is an amenable number.

2815009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2815009 is an equidigital number, since it uses as much as digits as its factorization.

2815009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2815009 is about 1677.7988556439. The cubic root of 2815009 is about 141.1973662460.

The spelling of 2815009 in words is "two million, eight hundred fifteen thousand, nine".