4421997 has 6 divisors (see below), whose sum is σ = 6387342. Its totient is φ = 2947992.

The previous prime is 4421987. The next prime is 4421999. The reversal of 4421997 is 7991244.

It can be written as a sum of positive squares in only one way, i.e., 2996361 + 1425636 = 1731^2 + 1194^2 .

It is not a de Polignac number, because 4421997 - 2⁷ = 4421869 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421999) 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 5 ways as a sum of consecutive naturals, for example, 245658 + ... + 245675.

It is an arithmetic number, because the mean of its divisors is an integer number (1064557).

Almost surely, 2^4421997 is an apocalyptic number.

It is an amenable number.

4421997 is a deficient number, since it is larger than the sum of its proper divisors (1965345).

4421997 is a wasteful number, since it uses less digits than its factorization.

4421997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491339 (or 491336 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 4421997 is about 2102.8544885465. The cubic root of 4421997 is about 164.1368701738.

The spelling of 4421997 in words is "four million, four hundred twenty-one thousand, nine hundred ninety-seven".