968721 has 16 divisors (see below), whose sum is σ = 1417920. Its totient is φ = 584640.

The previous prime is 968713. The next prime is 968729. The reversal of 968721 is 127869.

968721 = 98² + 99² + ... + 156².

It is an interprime number because it is at equal distance from previous prime (968713) and next prime (968729).

It is not a de Polignac number, because 968721 - 2³ = 968713 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 968721.

It is not an unprimeable number, because it can be changed into a prime (968729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2091 + ... + 2511.

It is an arithmetic number, because the mean of its divisors is an integer number (88620).

2⁹⁶⁸⁷²¹ is an apocalyptic number.

It is an amenable number.

968721 is a deficient number, since it is larger than the sum of its proper divisors (449199).

968721 is a wasteful number, since it uses less digits than its factorization.

968721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its digits is 6048, while the sum is 33.

The square root of 968721 is about 984.2362521265. The cubic root of 968721 is about 98.9463028872.

The spelling of 968721 in words is "nine hundred sixty-eight thousand, seven hundred twenty-one".