6820605 has 40 divisors (see below), whose sum is σ = 13346784. Its totient is φ = 3304800.

The previous prime is 6820579. The next prime is 6820607. The reversal of 6820605 is 5060286.

6820605 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6820605 - 2⁵ = 6820573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820607) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3690 + ... + 5220.

Almost surely, 2^6820605 is an apocalyptic number.

It is an amenable number.

6820605 is a deficient number, since it is larger than the sum of its proper divisors (6526179).

6820605 is a wasteful number, since it uses less digits than its factorization.

6820605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 6820605 is about 2611.6288021080. The cubic root of 6820605 is about 189.6448119523.

The spelling of 6820605 in words is "six million, eight hundred twenty thousand, six hundred five".