959721 has 16 divisors (see below), whose sum is σ = 1526784. Its totient is φ = 524304.

The previous prime is 959719. The next prime is 959723. The reversal of 959721 is 127959.

It is an interprime number because it is at equal distance from previous prime (959719) and next prime (959723).

It is not a de Polignac number, because 959721 - 2¹ = 959719 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 959721.

It is not an unprimeable number, because it can be changed into a prime (959723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511 + ... + 1476.

It is an arithmetic number, because the mean of its divisors is an integer number (95424).

2⁹⁵⁹⁷²¹ is an apocalyptic number.

It is an amenable number.

959721 is a deficient number, since it is larger than the sum of its proper divisors (567063).

959721 is a wasteful number, since it uses less digits than its factorization.

959721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020.

The product of its digits is 5670, while the sum is 33.

The square root of 959721 is about 979.6535101759. The cubic root of 959721 is about 98.6389254755.

The spelling of 959721 in words is "nine hundred fifty-nine thousand, seven hundred twenty-one".