994721 has 16 divisors (see below), whose sum is σ = 1298304. Its totient is φ = 739584.

The previous prime is 994717. The next prime is 994723. The reversal of 994721 is 127499.

It is a cyclic number.

It is not a de Polignac number, because 994721 - 2² = 994717 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 994721.

It is not an unprimeable number, because it can be changed into a prime (994723) 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, 1226 + ... + 1868.

It is an arithmetic number, because the mean of its divisors is an integer number (81144).

2⁹⁹⁴⁷²¹ is an apocalyptic number.

994721 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

994721 is a deficient number, since it is larger than the sum of its proper divisors (303583).

994721 is a wasteful number, since it uses less digits than its factorization.

994721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its digits is 4536, while the sum is 32.

The square root of 994721 is about 997.3570072948. The cubic root of 994721 is about 99.8237227793.

The spelling of 994721 in words is "nine hundred ninety-four thousand, seven hundred twenty-one".