2544005 has 16 divisors (see below), whose sum is σ = 3273600. Its totient is φ = 1892160.

The previous prime is 2543971. The next prime is 2544011. The reversal of 2544005 is 5004452.

It is a happy number.

It is not a de Polignac number, because 2544005 - 2¹⁸ = 2281861 is a prime.

It is a super-2 number, since 2×2544005² = 12943922880050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5576 + ... + 6014.

It is an arithmetic number, because the mean of its divisors is an integer number (204600).

2^2544005 is an apocalyptic number.

It is an amenable number.

2544005 is a deficient number, since it is larger than the sum of its proper divisors (729595).

2544005 is a wasteful number, since it uses less digits than its factorization.

2544005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524.

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

The square root of 2544005 is about 1594.9937303952. The cubic root of 2544005 is about 136.5125733654.

Adding to 2544005 its sum of digits (20), we get a square (2544025 = 1595²).

Adding to 2544005 its reverse (5004452), we get a palindrome (7548457).

The spelling of 2544005 in words is "two million, five hundred forty-four thousand, five".