5020821 has 18 divisors (see below), whose sum is σ = 7855458. Its totient is φ = 3088800.

The previous prime is 5020793. The next prime is 5020861. The reversal of 5020821 is 1280205.

It can be written as a sum of positive squares in 3 ways, for example, as 119025 + 4901796 = 345^2 + 2214^2 .

It is not a de Polignac number, because 5020821 - 2¹⁰ = 5019797 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5020794 and 5020803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5020861) 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 17 ways as a sum of consecutive naturals, for example, 130 + ... + 3171.

Almost surely, 2^5020821 is an apocalyptic number.

It is an amenable number.

5020821 is a deficient number, since it is larger than the sum of its proper divisors (2834637).

5020821 is a wasteful number, since it uses less digits than its factorization.

5020821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333 (or 3317 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 5020821 is about 2240.7188578668. The cubic root of 5020821 is about 171.2346220230.

The spelling of 5020821 in words is "five million, twenty thousand, eight hundred twenty-one".