5623021 has 2 divisors, whose sum is σ = 5623022. Its totient is φ = 5623020.

The previous prime is 5623003. The next prime is 5623043. The reversal of 5623021 is 1203265.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5470921 + 152100 = 2339^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 5623021 - 2¹⁵ = 5590253 is a prime.

It is a super-3 number, since 3×5623021³ (a number of 21 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5623021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5623081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2811510 + 2811511.

It is an arithmetic number, because the mean of its divisors is an integer number (2811511).

Almost surely, 2^5623021 is an apocalyptic number.

It is an amenable number.

5623021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5623021 is an equidigital number, since it uses as much as digits as its factorization.

5623021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 5623021 is about 2371.2909985913. The cubic root of 5623021 is about 177.8238062096.

Adding to 5623021 its reverse (1203265), we get a palindrome (6826286).

The spelling of 5623021 in words is "five million, six hundred twenty-three thousand, twenty-one".