4031021 has 8 divisors (see below), whose sum is σ = 4324320. Its totient is φ = 3745872.

The previous prime is 4030993. The next prime is 4031047. The reversal of 4031021 is 1201304.

It is a happy number.

4031021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4031021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4030993 and 4031011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4031081) 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 7 ways as a sum of consecutive naturals, for example, 995 + ... + 3008.

It is an arithmetic number, because the mean of its divisors is an integer number (540540).

Almost surely, 2^4031021 is an apocalyptic number.

It is an amenable number.

4031021 is a deficient number, since it is larger than the sum of its proper divisors (293299).

4031021 is a wasteful number, since it uses less digits than its factorization.

4031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 4031021 is about 2007.7402720472. The cubic root of 4031021 is about 159.1494053386.

Adding to 4031021 its reverse (1201304), we get a palindrome (5232325).

The spelling of 4031021 in words is "four million, thirty-one thousand, twenty-one".