2345509 has 2 divisors, whose sum is σ = 2345510. Its totient is φ = 2345508.

The previous prime is 2345501. The next prime is 2345533. The reversal of 2345509 is 9055432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 228484 = 1455^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 2345509 - 2³ = 2345501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2345501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1172754 + 1172755.

It is an arithmetic number, because the mean of its divisors is an integer number (1172755).

2^2345509 is an apocalyptic number.

It is an amenable number.

2345509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2345509 is an equidigital number, since it uses as much as digits as its factorization.

2345509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2345509 is about 1531.5054684852. The cubic root of 2345509 is about 132.8655433522.

The spelling of 2345509 in words is "two million, three hundred forty-five thousand, five hundred nine".