2402509 has 2 divisors, whose sum is σ = 2402510. Its totient is φ = 2402508.

The previous prime is 2402501. The next prime is 2402537. The reversal of 2402509 is 9052042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2402500 + 9 = 1550^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 2402509 - 2³ = 2402501 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 2402509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2402501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1201254 + 1201255.

It is an arithmetic number, because the mean of its divisors is an integer number (1201255).

2^2402509 is an apocalyptic number.

It is an amenable number.

2402509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2402509 is an equidigital number, since it uses as much as digits as its factorization.

2402509 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 22.

The square root of 2402509 is about 1550.0029032231. The cubic root of 2402509 is about 133.9332295252.

The spelling of 2402509 in words is "two million, four hundred two thousand, five hundred nine".