4221273 has 16 divisors (see below), whose sum is σ = 6543360. Its totient is φ = 2370576.

The previous prime is 4221271. The next prime is 4221281. The reversal of 4221273 is 3721224.

It is not a de Polignac number, because 4221273 - 2¹ = 4221271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (4221271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465 + ... + 2942.

It is an arithmetic number, because the mean of its divisors is an integer number (408960).

Almost surely, 2^4221273 is an apocalyptic number.

It is an amenable number.

4221273 is a deficient number, since it is larger than the sum of its proper divisors (2322087).

4221273 is a wasteful number, since it uses less digits than its factorization.

4221273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476.

The product of its digits is 672, while the sum is 21.

The square root of 4221273 is about 2054.5736784063. The cubic root of 4221273 is about 161.6148065257.

Adding to 4221273 its reverse (3721224), we get a palindrome (7942497).

The spelling of 4221273 in words is "four million, two hundred twenty-one thousand, two hundred seventy-three".