695721 has 8 divisors (see below), whose sum is σ = 999040. Its totient is φ = 428112.

The previous prime is 695719. The next prime is 695743. The reversal of 695721 is 127596.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 695721 - 2¹ = 695719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (695701) 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 7 ways as a sum of consecutive naturals, for example, 8881 + ... + 8958.

It is an arithmetic number, because the mean of its divisors is an integer number (124880).

2⁶⁹⁵⁷²¹ is an apocalyptic number.

It is an amenable number.

695721 is a deficient number, since it is larger than the sum of its proper divisors (303319).

695721 is a wasteful number, since it uses less digits than its factorization.

695721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17855.

The product of its digits is 3780, while the sum is 30.

The square root of 695721 is about 834.0989149975. The cubic root of 695721 is about 88.6091092585.

The spelling of 695721 in words is "six hundred ninety-five thousand, seven hundred twenty-one".