721059 has 4 divisors (see below), whose sum is σ = 961416. Its totient is φ = 480704.

The previous prime is 721057. The next prime is 721079. The reversal of 721059 is 950127.

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

It is a cyclic number.

It is not a de Polignac number, because 721059 - 2¹ = 721057 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (721051) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 120174 + ... + 120179.

It is an arithmetic number, because the mean of its divisors is an integer number (240354).

2⁷²¹⁰⁵⁹ is an apocalyptic number.

721059 is a deficient number, since it is larger than the sum of its proper divisors (240357).

721059 is a wasteful number, since it uses less digits than its factorization.

721059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240356.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 721059 is about 849.1519298689. The cubic root of 721059 is about 89.6720160678.

The spelling of 721059 in words is "seven hundred twenty-one thousand, fifty-nine".