4007221 has 8 divisors (see below), whose sum is σ = 4253760. Its totient is φ = 3766752.

The previous prime is 4007219. The next prime is 4007239. The reversal of 4007221 is 1227004.

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 4007221 - 2¹ = 4007219 is a prime.

It is a Duffinian number.

4007221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4007195 and 4007204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4007251) 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, 120 + ... + 2833.

It is an arithmetic number, because the mean of its divisors is an integer number (531720).

Almost surely, 2^4007221 is an apocalyptic number.

It is an amenable number.

4007221 is a deficient number, since it is larger than the sum of its proper divisors (246539).

4007221 is a wasteful number, since it uses less digits than its factorization.

4007221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3035.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 4007221 is about 2001.8044360027. The cubic root of 4007221 is about 158.8355696324.

The spelling of 4007221 in words is "four million, seven thousand, two hundred twenty-one".