848721 has 4 divisors (see below), whose sum is σ = 1131632. Its totient is φ = 565812.

The previous prime is 848713. The next prime is 848737. The reversal of 848721 is 127848.

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.

It is not a de Polignac number, because 848721 - 2³ = 848713 is a prime.

It is a D-number.

It is a Duffinian number.

848721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (848761) 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 3 ways as a sum of consecutive naturals, for example, 141451 + ... + 141456.

It is an arithmetic number, because the mean of its divisors is an integer number (282908).

2⁸⁴⁸⁷²¹ is an apocalyptic number.

It is an amenable number.

848721 is a deficient number, since it is larger than the sum of its proper divisors (282911).

848721 is a wasteful number, since it uses less digits than its factorization.

848721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282910.

The product of its digits is 3584, while the sum is 30.

The square root of 848721 is about 921.2605494647. The cubic root of 848721 is about 94.6792878652.

The spelling of 848721 in words is "eight hundred forty-eight thousand, seven hundred twenty-one".