721063 has 8 divisors (see below), whose sum is σ = 829440. Its totient is φ = 614040.

The previous prime is 721057. The next prime is 721079. The reversal of 721063 is 360127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-721063 is a prime.

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 721063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458 + ... + 1888.

It is an arithmetic number, because the mean of its divisors is an integer number (103680).

2⁷²¹⁰⁶³ is an apocalyptic number.

721063 is a deficient number, since it is larger than the sum of its proper divisors (108377).

721063 is a wasteful number, since it uses less digits than its factorization.

721063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 721063 is about 849.1542851567. The cubic root of 721063 is about 89.6721818829.

The spelling of 721063 in words is "seven hundred twenty-one thousand, sixty-three".