5816721 has 4 divisors (see below), whose sum is σ = 7755632. Its totient is φ = 3877812.

The previous prime is 5816689. The next prime is 5816731. The reversal of 5816721 is 1276185.

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 not a de Polignac number, because 5816721 - 2⁵ = 5816689 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5816731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969451 + ... + 969456.

It is an arithmetic number, because the mean of its divisors is an integer number (1938908).

Almost surely, 2^5816721 is an apocalyptic number.

It is an amenable number.

5816721 is a deficient number, since it is larger than the sum of its proper divisors (1938911).

5816721 is a wasteful number, since it uses less digits than its factorization.

5816721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938910.

The product of its digits is 3360, while the sum is 30.

The square root of 5816721 is about 2411.7879260001. The cubic root of 5816721 is about 179.8426711689.

The spelling of 5816721 in words is "five million, eight hundred sixteen thousand, seven hundred twenty-one".