2544538 has 4 divisors (see below), whose sum is σ = 3816810. Its totient is φ = 1272268.

The previous prime is 2544523. The next prime is 2544539. The reversal of 2544538 is 8354452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2537649 + 6889 = 1593^2 + 83^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2544539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636133 + ... + 636136.

2^2544538 is an apocalyptic number.

2544538 is a deficient number, since it is larger than the sum of its proper divisors (1272272).

2544538 is a wasteful number, since it uses less digits than its factorization.

2544538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272271.

The product of its digits is 19200, while the sum is 31.

The square root of 2544538 is about 1595.1608069408. The cubic root of 2544538 is about 136.5221063813.

The spelling of 2544538 in words is "two million, five hundred forty-four thousand, five hundred thirty-eight".