4033021 has 4 divisors (see below), whose sum is σ = 4037500. Its totient is φ = 4028544.

The previous prime is 4033019. The next prime is 4033039. The reversal of 4033021 is 1203304.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1428025 + 2604996 = 1195^2 + 1614^2 .

It is a cyclic number.

It is not a de Polignac number, because 4033021 - 2¹ = 4033019 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4032992 and 4033010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4033091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (1009375).

Almost surely, 2^4033021 is an apocalyptic number.

It is an amenable number.

4033021 is a deficient number, since it is larger than the sum of its proper divisors (4479).

4033021 is a wasteful number, since it uses less digits than its factorization.

4033021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 4033021 is about 2008.2382826746. The cubic root of 4033021 is about 159.1757217634.

Adding to 4033021 its reverse (1203304), we get a palindrome (5236325).

The spelling of 4033021 in words is "four million, thirty-three thousand, twenty-one".