4459721 has 16 divisors (see below), whose sum is σ = 5333376. Its totient is φ = 3649536.

The previous prime is 4459717. The next prime is 4459727. The reversal of 4459721 is 1279544.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4459721 - 2² = 4459717 is a prime.

It is a super-2 number, since 2×4459721² = 39778222795682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4459727) 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, 17225 + ... + 17481.

It is an arithmetic number, because the mean of its divisors is an integer number (333336).

Almost surely, 2^4459721 is an apocalyptic number.

It is an amenable number.

4459721 is a deficient number, since it is larger than the sum of its proper divisors (873655).

4459721 is a wasteful number, since it uses less digits than its factorization.

4459721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its digits is 10080, while the sum is 32.

The square root of 4459721 is about 2111.8051519967. The cubic root of 4459721 is about 164.6022989983.

The spelling of 4459721 in words is "four million, four hundred fifty-nine thousand, seven hundred twenty-one".