2509945 has 8 divisors (see below), whose sum is σ = 3020544. Its totient is φ = 2002224.

The previous prime is 2509937. The next prime is 2509961. The reversal of 2509945 is 5499052.

2509945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2509945 - 2³ = 2509937 is a prime.

It is a Duffinian number.

2509945 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2509945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2622 + ... + 3448.

It is an arithmetic number, because the mean of its divisors is an integer number (377568).

2^2509945 is an apocalyptic number.

It is an amenable number.

2509945 is a deficient number, since it is larger than the sum of its proper divisors (510599).

2509945 is an equidigital number, since it uses as much as digits as its factorization.

2509945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 2509945 is about 1584.2805938343. The cubic root of 2509945 is about 135.9006086089.

The spelling of 2509945 in words is "two million, five hundred nine thousand, nine hundred forty-five".