4662721 has 8 divisors (see below), whose sum is σ = 5560704. Its totient is φ = 3822720.

The previous prime is 4662689. The next prime is 4662773. The reversal of 4662721 is 1272664.

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 4662721 - 2⁵ = 4662689 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4662721.

It is not an unprimeable number, because it can be changed into a prime (4662221) 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, 14320 + ... + 14641.

It is an arithmetic number, because the mean of its divisors is an integer number (695088).

Almost surely, 2^4662721 is an apocalyptic number.

It is an amenable number.

4662721 is a deficient number, since it is larger than the sum of its proper divisors (897983).

4662721 is a wasteful number, since it uses less digits than its factorization.

4662721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28991.

The product of its digits is 4032, while the sum is 28.

The square root of 4662721 is about 2159.3334619739. Note that the first 3 decimals coincide. The cubic root of 4662721 is about 167.0628207368.

The spelling of 4662721 in words is "four million, six hundred sixty-two thousand, seven hundred twenty-one".