6845491 has 4 divisors (see below), whose sum is σ = 7205800. Its totient is φ = 6485184.

The previous prime is 6845417. The next prime is 6845519. The reversal of 6845491 is 1945486.

It is a happy number.

6845491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6845491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6845491.

It is not an unprimeable number, because it can be changed into a prime (6843491) 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 in 3 ways as a sum of consecutive naturals, for example, 180126 + ... + 180163.

It is an arithmetic number, because the mean of its divisors is an integer number (1801450).

Almost surely, 2^6845491 is an apocalyptic number.

6845491 is a deficient number, since it is larger than the sum of its proper divisors (360309).

6845491 is a wasteful number, since it uses less digits than its factorization.

6845491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360308.

The product of its digits is 34560, while the sum is 37.

The square root of 6845491 is about 2616.3889236885. The cubic root of 6845491 is about 189.8751811772.

It can be divided in two parts, 684 and 5491, that multiplied together give a square (3755844 = 1938²).

The spelling of 6845491 in words is "six million, eight hundred forty-five thousand, four hundred ninety-one".