894721 has 2 divisors, whose sum is σ = 894722. Its totient is φ = 894720.

The previous prime is 894713. The next prime is 894731. The reversal of 894721 is 127498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 746496 + 148225 = 864^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 894721 - 2³ = 894713 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (894731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447360 + 447361.

It is an arithmetic number, because the mean of its divisors is an integer number (447361).

2⁸⁹⁴⁷²¹ is an apocalyptic number.

It is an amenable number.

894721 is a deficient number, since it is larger than the sum of its proper divisors (1).

894721 is an equidigital number, since it uses as much as digits as its factorization.

894721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 894721 is about 945.8969288458. The cubic root of 894721 is about 96.3597971166.

The spelling of 894721 in words is "eight hundred ninety-four thousand, seven hundred twenty-one".