4472721 has 12 divisors (see below), whose sum is σ = 7048080. Its totient is φ = 2710680.

The previous prime is 4472701. The next prime is 4472747. The reversal of 4472721 is 1272744.

It is a happy number.

It is not a de Polignac number, because 4472721 - 2⁷ = 4472593 is a prime.

It is an Ulam number.

4472721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4472701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22491 + ... + 22688.

It is an arithmetic number, because the mean of its divisors is an integer number (587340).

Almost surely, 2^4472721 is an apocalyptic number.

It is an amenable number.

4472721 is a deficient number, since it is larger than the sum of its proper divisors (2575359).

4472721 is a wasteful number, since it uses less digits than its factorization.

4472721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45196 (or 45193 counting only the distinct ones).

The product of its digits is 3136, while the sum is 27.

The square root of 4472721 is about 2114.8808477075. The cubic root of 4472721 is about 164.7620813450.

The spelling of 4472721 in words is "four million, four hundred seventy-two thousand, seven hundred twenty-one".