4465721 has 4 divisors (see below), whose sum is σ = 4809252. Its totient is φ = 4122192.

The previous prime is 4465697. The next prime is 4465723. The reversal of 4465721 is 1275644.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3013696 + 1452025 = 1736^2 + 1205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4465721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4465723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171746 + ... + 171771.

It is an arithmetic number, because the mean of its divisors is an integer number (1202313).

Almost surely, 2^4465721 is an apocalyptic number.

It is an amenable number.

4465721 is a deficient number, since it is larger than the sum of its proper divisors (343531).

4465721 is a wasteful number, since it uses less digits than its factorization.

4465721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343530.

The product of its digits is 6720, while the sum is 29.

The square root of 4465721 is about 2113.2252601178. The cubic root of 4465721 is about 164.6760832269.

The spelling of 4465721 in words is "four million, four hundred sixty-five thousand, seven hundred twenty-one".