4081021 has 8 divisors (see below), whose sum is σ = 4691520. Its totient is φ = 3477408.

The previous prime is 4081019. The next prime is 4081039. The reversal of 4081021 is 1201804.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4081021 - 2¹ = 4081019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4080986 and 4081004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4081421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376 + ... + 2881.

It is an arithmetic number, because the mean of its divisors is an integer number (586440).

Almost surely, 2^4081021 is an apocalyptic number.

It is an amenable number.

4081021 is a deficient number, since it is larger than the sum of its proper divisors (610499).

4081021 is a wasteful number, since it uses less digits than its factorization.

4081021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 4081021 is about 2020.1537070233. The cubic root of 4081021 is about 159.8047227018.

Adding to 4081021 its reverse (1201804), we get a palindrome (5282825).

The spelling of 4081021 in words is "four million, eighty-one thousand, twenty-one".