2540530 has 8 divisors (see below), whose sum is σ = 4572972. Its totient is φ = 1016208.

The previous prime is 2540519. The next prime is 2540533. The reversal of 2540530 is 350452.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2424249 + 116281 = 1557^2 + 341^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2540498 and 2540507.

It is not an unprimeable number, because it can be changed into a prime (2540533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127017 + ... + 127036.

2^2540530 is an apocalyptic number.

2540530 is a deficient number, since it is larger than the sum of its proper divisors (2032442).

2540530 is a wasteful number, since it uses less digits than its factorization.

2540530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254060.

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

The square root of 2540530 is about 1593.9040121664. The cubic root of 2540530 is about 136.4503883001.

Adding to 2540530 its reverse (350452), we get a palindrome (2890982).

The spelling of 2540530 in words is "two million, five hundred forty thousand, five hundred thirty".