4020813 has 16 divisors (see below), whose sum is σ = 6005760. Its totient is φ = 2658528.

The previous prime is 4020781. The next prime is 4020833. The reversal of 4020813 is 3180204.

It is a happy number.

It is not a de Polignac number, because 4020813 - 2⁵ = 4020781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020833) 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 15 ways as a sum of consecutive naturals, for example, 3156 + ... + 4242.

It is an arithmetic number, because the mean of its divisors is an integer number (375360).

Almost surely, 2^4020813 is an apocalyptic number.

It is an amenable number.

4020813 is a deficient number, since it is larger than the sum of its proper divisors (1984947).

4020813 is a wasteful number, since it uses less digits than its factorization.

4020813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4020813 is about 2005.1964990993. The cubic root of 4020813 is about 159.0149505344.

The spelling of 4020813 in words is "four million, twenty thousand, eight hundred thirteen".