6872581 has 2 divisors, whose sum is σ = 6872582. Its totient is φ = 6872580.

The previous prime is 6872521. The next prime is 6872603. The reversal of 6872581 is 1852786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4796100 + 2076481 = 2190^2 + 1441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6872581 is a prime.

It is a super-2 number, since 2×6872581² = 94464739203122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6872581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6872501) 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, 3436290 + 3436291.

It is an arithmetic number, because the mean of its divisors is an integer number (3436291).

Almost surely, 2^6872581 is an apocalyptic number.

It is an amenable number.

6872581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6872581 is an equidigital number, since it uses as much as digits as its factorization.

6872581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 6872581 is about 2621.5607946412. The cubic root of 6872581 is about 190.1253189868.

The spelling of 6872581 in words is "six million, eight hundred seventy-two thousand, five hundred eighty-one".