716021 has 4 divisors (see below), whose sum is σ = 722700. Its totient is φ = 709344.

The previous prime is 716003. The next prime is 716033. The reversal of 716021 is 120617.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120617 = 7 ⋅17231.

It can be written as a sum of positive squares in 2 ways, for example, as 579121 + 136900 = 761^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 716021 - 2¹⁸ = 453877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 716021.

It is not an unprimeable number, because it can be changed into a prime (716321) 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, 3176 + ... + 3393.

It is an arithmetic number, because the mean of its divisors is an integer number (180675).

2⁷¹⁶⁰²¹ is an apocalyptic number.

It is an amenable number.

716021 is a deficient number, since it is larger than the sum of its proper divisors (6679).

716021 is a wasteful number, since it uses less digits than its factorization.

716021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6678.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 716021 is about 846.1802408471. The cubic root of 716021 is about 89.4626832769.

Adding to 716021 its reverse (120617), we get a palindrome (836638).

The spelling of 716021 in words is "seven hundred sixteen thousand, twenty-one".