797221 has 4 divisors (see below), whose sum is σ = 839200. Its totient is φ = 755244.

The previous prime is 797207. The next prime is 797273. The reversal of 797221 is 122797.

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 797221 - 2⁹ = 796709 is a prime.

It is a super-2 number, since 2×797221² = 1271122645682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 797221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797201) 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, 20961 + ... + 20998.

It is an arithmetic number, because the mean of its divisors is an integer number (209800).

2⁷⁹⁷²²¹ is an apocalyptic number.

797221 is the 516-th hex number.

It is an amenable number.

797221 is a deficient number, since it is larger than the sum of its proper divisors (41979).

797221 is a wasteful number, since it uses less digits than its factorization.

797221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41978.

The product of its digits is 1764, while the sum is 28.

The square root of 797221 is about 892.8723312994. The cubic root of 797221 is about 92.7241605039.

The spelling of 797221 in words is "seven hundred ninety-seven thousand, two hundred twenty-one".