721196 has 24 divisors (see below), whose sum is σ = 1478400. Its totient is φ = 301392.

The previous prime is 721181. The next prime is 721199. The reversal of 721196 is 691127.

It is a super-3 number, since 3×721196³ = 1125333331828012608, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (721199) by changing a digit.

721196 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905 + ... + 1503.

It is an arithmetic number, because the mean of its divisors is an integer number (61600).

2⁷²¹¹⁹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739200).

721196 is an abundant number, since it is smaller than the sum of its proper divisors (757204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721196 is a wasteful number, since it uses less digits than its factorization.

721196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 651 counting only the distinct ones).

The product of its digits is 756, while the sum is 26.

The square root of 721196 is about 849.2325947584. The cubic root of 721196 is about 89.6776948857.

The spelling of 721196 in words is "seven hundred twenty-one thousand, one hundred ninety-six".