2561006 has 8 divisors (see below), whose sum is σ = 4390320. Its totient is φ = 1097568.

The previous prime is 2560997. The next prime is 2561017. The reversal of 2561006 is 6001652.

2561006 is nontrivially palindromic in base 13.

It is a sphenic number, since it is the product of 3 distinct 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 in 3 ways as a sum of consecutive naturals, for example, 91451 + ... + 91478.

It is an arithmetic number, because the mean of its divisors is an integer number (548790).

2^2561006 is an apocalyptic number.

2561006 is a deficient number, since it is larger than the sum of its proper divisors (1829314).

2561006 is a wasteful number, since it uses less digits than its factorization.

2561006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182938.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2561006 is about 1600.3143441212. The cubic root of 2561006 is about 136.8159925104.

Adding to 2561006 its reverse (6001652), we get a palindrome (8562658).

The spelling of 2561006 in words is "two million, five hundred sixty-one thousand, six".