886721 has 4 divisors (see below), whose sum is σ = 967344. Its totient is φ = 806100.

The previous prime is 886667. The next prime is 886741. The reversal of 886721 is 127688.

886721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 886721 - 2¹⁸ = 624577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (886741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40295 + ... + 40316.

It is an arithmetic number, because the mean of its divisors is an integer number (241836).

2⁸⁸⁶⁷²¹ is an apocalyptic number.

It is an amenable number.

886721 is a deficient number, since it is larger than the sum of its proper divisors (80623).

886721 is a wasteful number, since it uses less digits than its factorization.

886721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80622.

The product of its digits is 5376, while the sum is 32.

The square root of 886721 is about 941.6586430337. The cubic root of 886721 is about 96.0717418015.

It can be divided in two parts, 8867 and 21, that added together give a palindrome (8888).

The spelling of 886721 in words is "eight hundred eighty-six thousand, seven hundred twenty-one".