2540305 has 8 divisors (see below), whose sum is σ = 3094272. Its totient is φ = 2001648.

The previous prime is 2540269. The next prime is 2540323. The reversal of 2540305 is 5030452.

It is a happy number.

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 2540305 - 2⁷ = 2540177 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3457 + ... + 4126.

It is an arithmetic number, because the mean of its divisors is an integer number (386784).

2^2540305 is an apocalyptic number.

It is an amenable number.

2540305 is a deficient number, since it is larger than the sum of its proper divisors (553967).

2540305 is an equidigital number, since it uses as much as digits as its factorization.

2540305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 2540305 is about 1593.8334291889. The cubic root of 2540305 is about 136.4463599748.

Adding to 2540305 its reverse (5030452), we get a palindrome (7570757).

The spelling of 2540305 in words is "two million, five hundred forty thousand, three hundred five".