2540225 has 24 divisors (see below), whose sum is σ = 3437280. Its totient is φ = 1854720.

The previous prime is 2540203. The next prime is 2540231. The reversal of 2540225 is 5220452.

It is not a de Polignac number, because 2540225 - 2²⁰ = 1491649 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2540197 and 2540206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18206 + ... + 18344.

It is an arithmetic number, because the mean of its divisors is an integer number (143220).

2^2540225 is an apocalyptic number.

2540225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2540225 is a deficient number, since it is larger than the sum of its proper divisors (897055).

2540225 is a wasteful number, since it uses less digits than its factorization.

2540225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 2540225 is about 1593.8083322658. The cubic root of 2540225 is about 136.4449276240. Note that the first 3 decimals are identical.

Adding to 2540225 its reverse (5220452), we get a palindrome (7760677).

The spelling of 2540225 in words is "two million, five hundred forty thousand, two hundred twenty-five".