2290509 has 12 divisors (see below), whose sum is σ = 3563196. Its totient is φ = 1409472.

The previous prime is 2290499. The next prime is 2290511. The reversal of 2290509 is 9050922.

It can be written as a sum of positive squares in 2 ways, for example, as 1334025 + 956484 = 1155^2 + 978^2 .

It is not a de Polignac number, because 2290509 - 2⁴ = 2290493 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2290609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9672 + ... + 9905.

It is an arithmetic number, because the mean of its divisors is an integer number (296933).

2^2290509 is an apocalyptic number.

It is an amenable number.

2290509 is a deficient number, since it is larger than the sum of its proper divisors (1272687).

2290509 is a wasteful number, since it uses less digits than its factorization.

2290509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19596 (or 19593 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 2290509 is about 1513.4427640317. The cubic root of 2290509 is about 131.8187940591.

The spelling of 2290509 in words is "two million, two hundred ninety thousand, five hundred nine".