2543006 has 4 divisors (see below), whose sum is σ = 3814512.
Its totient is φ = 1271502.
The previous prime is 2542999. The next prime is 2543027. The reversal of 2543006 is 6003452.
It is a semiprime because it is the product of two primes.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635750 + ... + 635753.
It is an arithmetic number, because the mean of its divisors is an integer number (953628).
22543006 is an apocalyptic number.
2543006 is a deficient number, since it is larger than the sum of its proper divisors (1271506).
2543006 is a wasteful number, since it uses less digits than its factorization.
2543006 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1271505.
The product of its (nonzero) digits is 720, while the sum is 20.
The square root of 2543006 is about 1594.6805322697.
The cubic root of 2543006 is about 136.4947020803.
Adding to 2543006 its reverse (6003452), we get a palindrome (8546458).
The spelling of 2543006 in words is "two million, five hundred forty-three thousand, six".