4481721 has 6 divisors (see below), whose sum is σ = 6473610. Its totient is φ = 2987808.

The previous prime is 4481717. The next prime is 4481723. The reversal of 4481721 is 1271844.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 1022121 = 1860^2 + 1011^2 .

It is not a de Polignac number, because 4481721 - 2² = 4481717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4481723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 248976 + ... + 248993.

It is an arithmetic number, because the mean of its divisors is an integer number (1078935).

Almost surely, 2^4481721 is an apocalyptic number.

It is an amenable number.

4481721 is a deficient number, since it is larger than the sum of its proper divisors (1991889).

4481721 is a wasteful number, since it uses less digits than its factorization.

4481721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497975 (or 497972 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 4481721 is about 2117.0075578514. The cubic root of 4481721 is about 164.8725186113.

The spelling of 4481721 in words is "four million, four hundred eighty-one thousand, seven hundred twenty-one".