2581673 has 2 divisors, whose sum is σ = 2581674. Its totient is φ = 2581672.

The previous prime is 2581669. The next prime is 2581687. The reversal of 2581673 is 3761852.

It is a happy number.

2581673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2319529 + 262144 = 1523^2 + 512^2 .

It is a cyclic number.

It is not a de Polignac number, because 2581673 - 2² = 2581669 is a prime.

It is not a weakly prime, because it can be changed into another prime (2581613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290836 + 1290837.

It is an arithmetic number, because the mean of its divisors is an integer number (1290837).

2^2581673 is an apocalyptic number.

It is an amenable number.

2581673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581673 is an equidigital number, since it uses as much as digits as its factorization.

2581673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 2581673 is about 1606.7585381755. The cubic root of 2581673 is about 137.1830362909.

The spelling of 2581673 in words is "two million, five hundred eighty-one thousand, six hundred seventy-three".