721082 has 4 divisors (see below), whose sum is σ = 1081626. Its totient is φ = 360540.

The previous prime is 721079. The next prime is 721087. The reversal of 721082 is 280127.

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

It can be written as a sum of positive squares in only one way, i.e., 703921 + 17161 = 839^2 + 131^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 721082.

It is not an unprimeable number, because it can be changed into a prime (721087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180269 + ... + 180272.

2⁷²¹⁰⁸² is an apocalyptic number.

721082 is a deficient number, since it is larger than the sum of its proper divisors (360544).

721082 is a wasteful number, since it uses less digits than its factorization.

721082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360543.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 721082 is about 849.1654726848. The cubic root of 721082 is about 89.6729694963.

The spelling of 721082 in words is "seven hundred twenty-one thousand, eighty-two".