5717721 has 8 divisors (see below), whose sum is σ = 7829824. Its totient is φ = 3708720.

The previous prime is 5717707. The next prime is 5717741. The reversal of 5717721 is 1277175.

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

It is not a de Polignac number, because 5717721 - 2¹¹ = 5715673 is a prime.

It is a Duffinian number.

5717721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5717741) 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, 25645 + ... + 25866.

It is an arithmetic number, because the mean of its divisors is an integer number (978728).

Almost surely, 2^5717721 is an apocalyptic number.

It is an amenable number.

5717721 is a deficient number, since it is larger than the sum of its proper divisors (2112103).

5717721 is a wasteful number, since it uses less digits than its factorization.

5717721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51551.

The product of its digits is 3430, while the sum is 30.

The square root of 5717721 is about 2391.1756522681. The cubic root of 5717721 is about 178.8165260063.

The spelling of 5717721 in words is "five million, seven hundred seventeen thousand, seven hundred twenty-one".