2543506 has 16 divisors (see below), whose sum is σ = 4617216. Its totient is φ = 1025856.

The previous prime is 2543479. The next prime is 2543507. The reversal of 2543506 is 6053452.

It is not an unprimeable number, because it can be changed into a prime (2543507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5106 + ... + 5581.

It is an arithmetic number, because the mean of its divisors is an integer number (288576).

2^2543506 is an apocalyptic number.

2543506 is a deficient number, since it is larger than the sum of its proper divisors (2073710).

2543506 is a wasteful number, since it uses less digits than its factorization.

2543506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10713.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2543506 is about 1594.8372957766. The cubic root of 2543506 is about 136.5036472523.

Adding to 2543506 its reverse (6053452), we get a palindrome (8596958).

The spelling of 2543506 in words is "two million, five hundred forty-three thousand, five hundred six".