5711721 has 4 divisors (see below), whose sum is σ = 7615632. Its totient is φ = 3807812.

The previous prime is 5711681. The next prime is 5711747. The reversal of 5711721 is 1271175.

It is a happy number.

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 not a de Polignac number, because 5711721 - 2¹⁷ = 5580649 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 5711691 and 5711700.

It is not an unprimeable number, because it can be changed into a prime (5711821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 951951 + ... + 951956.

It is an arithmetic number, because the mean of its divisors is an integer number (1903908).

Almost surely, 2^5711721 is an apocalyptic number.

It is an amenable number.

5711721 is a deficient number, since it is larger than the sum of its proper divisors (1903911).

5711721 is a wasteful number, since it uses less digits than its factorization.

5711721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903910.

The product of its digits is 490, while the sum is 24.

The square root of 5711721 is about 2389.9207099818. The cubic root of 5711721 is about 178.7539559331.

Adding to 5711721 its reverse (1271175), we get a palindrome (6982896).

The spelling of 5711721 in words is "five million, seven hundred eleven thousand, seven hundred twenty-one".