966721 has 12 divisors (see below), whose sum is σ = 1141140. Its totient is φ = 816480.

The previous prime is 966677. The next prime is 966727. The reversal of 966721 is 127669.

It can be written as a sum of positive squares in 2 ways, for example, as 261121 + 705600 = 511^2 + 840^2 .

It is not a de Polignac number, because 966721 - 2⁹ = 966209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (966727) 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 in 11 ways as a sum of consecutive naturals, for example, 5251 + ... + 5431.

It is an arithmetic number, because the mean of its divisors is an integer number (95095).

2⁹⁶⁶⁷²¹ is an apocalyptic number.

It is an amenable number.

966721 is a deficient number, since it is larger than the sum of its proper divisors (174419).

966721 is a wasteful number, since it uses less digits than its factorization.

966721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 297 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 966721 is about 983.2197109497. The cubic root of 966721 is about 98.8781618536.

The spelling of 966721 in words is "nine hundred sixty-six thousand, seven hundred twenty-one".