5271021 has 24 divisors (see below), whose sum is σ = 8978240. Its totient is φ = 2993976.

The previous prime is 5270987. The next prime is 5271041. The reversal of 5271021 is 1201725.

It is not a de Polignac number, because 5271021 - 2¹¹ = 5268973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5270985 and 5271003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5271041) 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 23 ways as a sum of consecutive naturals, for example, 31480 + ... + 31646.

Almost surely, 2^5271021 is an apocalyptic number.

It is an amenable number.

5271021 is a deficient number, since it is larger than the sum of its proper divisors (3707219).

5271021 is an equidigital number, since it uses as much as digits as its factorization.

5271021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 5271021 is about 2295.8704231729. The cubic root of 5271021 is about 174.0329901775.

Adding to 5271021 its reverse (1201725), we get a palindrome (6472746).

The spelling of 5271021 in words is "five million, two hundred seventy-one thousand, twenty-one".