2509443 has 6 divisors (see below), whose sum is σ = 3624764. Its totient is φ = 1672956.

The previous prime is 2509433. The next prime is 2509483. The reversal of 2509443 is 3449052.

It is not a de Polignac number, because 2509443 - 2⁴ = 2509427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2509433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139405 + ... + 139422.

2^2509443 is an apocalyptic number.

2509443 is a deficient number, since it is larger than the sum of its proper divisors (1115321).

2509443 is a wasteful number, since it uses less digits than its factorization.

2509443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278833 (or 278830 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2509443 is about 1584.1221543808. The cubic root of 2509443 is about 135.8915477657.

The spelling of 2509443 in words is "two million, five hundred nine thousand, four hundred forty-three".