4067021 has 8 divisors (see below), whose sum is σ = 4850304. Its totient is φ = 3334320.

The previous prime is 4067009. The next prime is 4067027. The reversal of 4067021 is 1207604.

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-4067021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4066984 and 4067002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4067027) 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 7 ways as a sum of consecutive naturals, for example, 12470 + ... + 12791.

It is an arithmetic number, because the mean of its divisors is an integer number (606288).

Almost surely, 2^4067021 is an apocalyptic number.

It is an amenable number.

4067021 is a deficient number, since it is larger than the sum of its proper divisors (783283).

4067021 is a wasteful number, since it uses less digits than its factorization.

4067021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25291.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 4067021 is about 2016.6856472936. The cubic root of 4067021 is about 159.6217758911.

The spelling of 4067021 in words is "four million, sixty-seven thousand, twenty-one".