2540306 has 8 divisors (see below), whose sum is σ = 3822780. Its totient is φ = 1266048.

The previous prime is 2540269. The next prime is 2540323. The reversal of 2540306 is 6030452.

It can be written as a sum of positive squares in 2 ways, for example, as 2531281 + 9025 = 1591^2 + 95^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211 + ... + 2558.

2^2540306 is an apocalyptic number.

2540306 is a deficient number, since it is larger than the sum of its proper divisors (1282474).

2540306 is a wasteful number, since it uses less digits than its factorization.

2540306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2540306 is about 1593.8337428979. The cubic root of 2540306 is about 136.4463778790.

Adding to 2540306 its reverse (6030452), we get a palindrome (8570758).

The spelling of 2540306 in words is "two million, five hundred forty thousand, three hundred six".