6821045 has 24 divisors (see below), whose sum is σ = 10391328. Its totient is φ = 4250400.

The previous prime is 6821021. The next prime is 6821077. The reversal of 6821045 is 5401286.

It is not a de Polignac number, because 6821045 - 2¹⁴ = 6804661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1430 + ... + 3960.

It is an arithmetic number, because the mean of its divisors is an integer number (432972).

Almost surely, 2^6821045 is an apocalyptic number.

It is an amenable number.

6821045 is a deficient number, since it is larger than the sum of its proper divisors (3570283).

6821045 is a wasteful number, since it uses less digits than its factorization.

6821045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 6821045 is about 2611.7130393671. The cubic root of 6821045 is about 189.6488898859.

The spelling of 6821045 in words is "six million, eight hundred twenty-one thousand, forty-five".