5811021 has 10 divisors (see below), whose sum is σ = 8680782. Its totient is φ = 3873960.

The previous prime is 5811011. The next prime is 5811061. The reversal of 5811021 is 1201185.

It can be written as a sum of positive squares in only one way, i.e., 5225796 + 585225 = 2286^2 + 765^2 .

It is not a de Polignac number, because 5811021 - 2⁵ = 5810989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5810985 and 5811003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5811011) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 35790 + ... + 35951.

Almost surely, 2^5811021 is an apocalyptic number.

It is an amenable number.

5811021 is a deficient number, since it is larger than the sum of its proper divisors (2869761).

5811021 is an equidigital number, since it uses as much as digits as its factorization.

5811021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71753 (or 71744 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 5811021 is about 2410.6059404224. The cubic root of 5811021 is about 179.7839073481.

The spelling of 5811021 in words is "five million, eight hundred eleven thousand, twenty-one".