4221997 has 8 divisors (see below), whose sum is σ = 4605440. Its totient is φ = 3846960.

The previous prime is 4221989. The next prime is 4222003. The reversal of 4221997 is 7991224.

It is a happy number.

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

It is not a de Polignac number, because 4221997 - 2³ = 4221989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221977) 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, 1029 + ... + 3082.

It is an arithmetic number, because the mean of its divisors is an integer number (575680).

Almost surely, 2^4221997 is an apocalyptic number.

It is an amenable number.

4221997 is a deficient number, since it is larger than the sum of its proper divisors (383443).

4221997 is a wasteful number, since it uses less digits than its factorization.

4221997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203.

The product of its digits is 9072, while the sum is 34.

The square root of 4221997 is about 2054.7498631220. The cubic root of 4221997 is about 161.6240456368.

The spelling of 4221997 in words is "four million, two hundred twenty-one thousand, nine hundred ninety-seven".