721062 has 20 divisors (see below), whose sum is σ = 1616076. Its totient is φ = 240300.

The previous prime is 721057. The next prime is 721079. The reversal of 721062 is 260127.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

721062 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 9 ways as a sum of consecutive naturals, for example, 2064 + ... + 2387.

2⁷²¹⁰⁶² is an apocalyptic number.

721062 is an abundant number, since it is smaller than the sum of its proper divisors (895014).

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

721062 is a wasteful number, since it uses less digits than its factorization.

721062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4465 (or 4456 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 721062 is about 849.1536963354. The cubic root of 721062 is about 89.6721404292.

Adding to 721062 its reverse (260127), we get a palindrome (981189).

The spelling of 721062 in words is "seven hundred twenty-one thousand, sixty-two".