721159 has 2 divisors, whose sum is σ = 721160. Its totient is φ = 721158.

The previous prime is 721141. The next prime is 721163. The reversal of 721159 is 951127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721159 - 2¹³ = 712967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721109) 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 as a sum of consecutive naturals, namely, 360579 + 360580.

It is an arithmetic number, because the mean of its divisors is an integer number (360580).

2⁷²¹¹⁵⁹ is an apocalyptic number.

721159 is a deficient number, since it is larger than the sum of its proper divisors (1).

721159 is an equidigital number, since it uses as much as digits as its factorization.

721159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 25.

The square root of 721159 is about 849.2108101055. The cubic root of 721159 is about 89.6761612613.

The spelling of 721159 in words is "seven hundred twenty-one thousand, one hundred fifty-nine".