995721 has 4 divisors (see below), whose sum is σ = 1327632. Its totient is φ = 663812.

The previous prime is 995719. The next prime is 995737. The reversal of 995721 is 127599.

995721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 127599 = 3 ⋅42533.

It is a cyclic number.

It is not a de Polignac number, because 995721 - 2¹ = 995719 is a prime.

It is an Ulam number.

It is a D-number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 995721.

It is not an unprimeable number, because it can be changed into a prime (995791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165951 + ... + 165956.

It is an arithmetic number, because the mean of its divisors is an integer number (331908).

2⁹⁹⁵⁷²¹ is an apocalyptic number.

It is an amenable number.

995721 is a deficient number, since it is larger than the sum of its proper divisors (331911).

995721 is a wasteful number, since it uses less digits than its factorization.

995721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331910.

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

The square root of 995721 is about 997.8582063600. The cubic root of 995721 is about 99.8571627390.

The spelling of 995721 in words is "nine hundred ninety-five thousand, seven hundred twenty-one".