2540547 has 24 divisors (see below), whose sum is σ = 3931200. Its totient is φ = 1576368.

The previous prime is 2540539. The next prime is 2540563. The reversal of 2540547 is 7450452.

It is not a de Polignac number, because 2540547 - 2³ = 2540539 is a prime.

It is an Ulam number.

2540547 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2540547.

It is not an unprimeable number, because it can be changed into a prime (2540537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14104 + ... + 14282.

It is an arithmetic number, because the mean of its divisors is an integer number (163800).

2^2540547 is an apocalyptic number.

2540547 is a deficient number, since it is larger than the sum of its proper divisors (1390653).

2540547 is a wasteful number, since it uses less digits than its factorization.

2540547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 2540547 is about 1593.9093449754. The cubic root of 2540547 is about 136.4506926527.

Adding to 2540547 its reverse (7450452), we get a palindrome (9990999).

It can be divided in two parts, 25405 and 47, that added together give a palindrome (25452).

The spelling of 2540547 in words is "two million, five hundred forty thousand, five hundred forty-seven".