4220997 has 16 divisors (see below), whose sum is σ = 6307392. Its totient is φ = 2488320.

The previous prime is 4220987. The next prime is 4221011. The reversal of 4220997 is 7990224.

It is not a de Polignac number, because 4220997 - 2²² = 26693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508 + ... + 2949.

It is an arithmetic number, because the mean of its divisors is an integer number (394212).

Almost surely, 2^4220997 is an apocalyptic number.

It is an amenable number.

4220997 is a deficient number, since it is larger than the sum of its proper divisors (2086395).

4220997 is a wasteful number, since it uses less digits than its factorization.

4220997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 4220997 is about 2054.5065100895. The cubic root of 4220997 is about 161.6112841555.

Adding to 4220997 its reverse (7990224), we get a palindrome (12211221).

The spelling of 4220997 in words is "four million, two hundred twenty thousand, nine hundred ninety-seven".