4406721 has 16 divisors (see below), whose sum is σ = 6568128. Its totient is φ = 2604800.

The previous prime is 4406713. The next prime is 4406741. The reversal of 4406721 is 1276044.

It is not a de Polignac number, because 4406721 - 2³ = 4406713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4406691 and 4406700.

It is not an unprimeable number, because it can be changed into a prime (4406741) 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 15 ways as a sum of consecutive naturals, for example, 276 + ... + 2981.

It is an arithmetic number, because the mean of its divisors is an integer number (410508).

Almost surely, 2^4406721 is an apocalyptic number.

4406721 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4406721 is a deficient number, since it is larger than the sum of its proper divisors (2161407).

4406721 is a wasteful number, since it uses less digits than its factorization.

4406721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 4406721 is about 2099.2191405377. The cubic root of 4406721 is about 163.9476458903.

The spelling of 4406721 in words is "four million, four hundred six thousand, seven hundred twenty-one".