713221 has 4 divisors (see below), whose sum is σ = 726732. Its totient is φ = 699712.

The previous prime is 713191. The next prime is 713227. The reversal of 713221 is 122317.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 656100 + 57121 = 810^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 713221 - 2⁵ = 713189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 713195 and 713204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (713227) 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, 6676 + ... + 6781.

It is an arithmetic number, because the mean of its divisors is an integer number (181683).

2⁷¹³²²¹ is an apocalyptic number.

It is an amenable number.

713221 is a deficient number, since it is larger than the sum of its proper divisors (13511).

713221 is a wasteful number, since it uses less digits than its factorization.

713221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13510.

The product of its digits is 84, while the sum is 16.

The square root of 713221 is about 844.5241263576. The cubic root of 713221 is about 89.3459163360.

Adding to 713221 its reverse (122317), we get a palindrome (835538).

The spelling of 713221 in words is "seven hundred thirteen thousand, two hundred twenty-one".