4315721 has 4 divisors (see below), whose sum is σ = 4321152. Its totient is φ = 4310292.

The previous prime is 4315709. The next prime is 4315723. The reversal of 4315721 is 1275134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4315721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4315723) 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, 1265 + ... + 3198.

It is an arithmetic number, because the mean of its divisors is an integer number (1080288).

Almost surely, 2^4315721 is an apocalyptic number.

It is an amenable number.

4315721 is a deficient number, since it is larger than the sum of its proper divisors (5431).

4315721 is an equidigital number, since it uses as much as digits as its factorization.

4315721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5430.

The product of its digits is 840, while the sum is 23.

The square root of 4315721 is about 2077.4313466394. The cubic root of 4315721 is about 162.8112661160.

The spelling of 4315721 in words is "four million, three hundred fifteen thousand, seven hundred twenty-one".