2581973 has 2 divisors, whose sum is σ = 2581974. Its totient is φ = 2581972.

The previous prime is 2581963. The next prime is 2581991. The reversal of 2581973 is 3791852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2439844 + 142129 = 1562^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 2581973 - 2¹² = 2577877 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2581913) by changing a digit.

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, 1290986 + 1290987.

It is an arithmetic number, because the mean of its divisors is an integer number (1290987).

2^2581973 is an apocalyptic number.

It is an amenable number.

2581973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581973 is an equidigital number, since it uses as much as digits as its factorization.

2581973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The square root of 2581973 is about 1606.8518911213. The cubic root of 2581973 is about 137.1883498113.

The spelling of 2581973 in words is "two million, five hundred eighty-one thousand, nine hundred seventy-three".