6743581 has 4 divisors (see below), whose sum is σ = 7262332. Its totient is φ = 6224832.

The previous prime is 6743579. The next prime is 6743603. The reversal of 6743581 is 1853476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 4687225 = 1434^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 6743581 - 2¹ = 6743579 is a prime.

It is a super-2 number, since 2×6743581² = 90951769407122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6743281) 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 in 3 ways as a sum of consecutive naturals, for example, 259356 + ... + 259381.

It is an arithmetic number, because the mean of its divisors is an integer number (1815583).

Almost surely, 2^6743581 is an apocalyptic number.

It is an amenable number.

6743581 is a deficient number, since it is larger than the sum of its proper divisors (518751).

6743581 is a wasteful number, since it uses less digits than its factorization.

6743581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518750.

The product of its digits is 20160, while the sum is 34.

The square root of 6743581 is about 2596.8405803976. The cubic root of 6743581 is about 188.9282315717.

The spelling of 6743581 in words is "six million, seven hundred forty-three thousand, five hundred eighty-one".