4394721 has 8 divisors (see below), whose sum is σ = 6204384. Its totient is φ = 2757440.

The previous prime is 4394717. The next prime is 4394737. The reversal of 4394721 is 1274934.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4394721 - 2² = 4394717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4394791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43035 + ... + 43136.

It is an arithmetic number, because the mean of its divisors is an integer number (775548).

Almost surely, 2^4394721 is an apocalyptic number.

It is an amenable number.

4394721 is a deficient number, since it is larger than the sum of its proper divisors (1809663).

4394721 is a wasteful number, since it uses less digits than its factorization.

4394721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86191.

The product of its digits is 6048, while the sum is 30.

The square root of 4394721 is about 2096.3589864334. The cubic root of 4394721 is about 163.7986946066.

It can be divided in two parts, 4394 and 721, that added together give a palindrome (5115).

The spelling of 4394721 in words is "four million, three hundred ninety-four thousand, seven hundred twenty-one".