4681721 has 8 divisors (see below), whose sum is σ = 5245824. Its totient is φ = 4140720.

The previous prime is 4681697. The next prime is 4681727. The reversal of 4681721 is 1271864.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4681721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4681727) 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, 5345 + ... + 6158.

It is an arithmetic number, because the mean of its divisors is an integer number (655728).

Almost surely, 2^4681721 is an apocalyptic number.

It is an amenable number.

4681721 is a deficient number, since it is larger than the sum of its proper divisors (564103).

4681721 is a wasteful number, since it uses less digits than its factorization.

4681721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11551.

The product of its digits is 2688, while the sum is 29.

The square root of 4681721 is about 2163.7284949827. The cubic root of 4681721 is about 167.2894331839.

The spelling of 4681721 in words is "four million, six hundred eighty-one thousand, seven hundred twenty-one".