888921 has 32 divisors (see below), whose sum is σ = 1491840. Its totient is φ = 518400.

The previous prime is 888919. The next prime is 888931. The reversal of 888921 is 129888.

It is not a de Polignac number, because 888921 - 2¹ = 888919 is a prime.

Its product of digits (9216) is a multiple of the sum of its prime divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (888931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12141 + ... + 12213.

It is an arithmetic number, because the mean of its divisors is an integer number (46620).

2⁸⁸⁸⁹²¹ is an apocalyptic number.

It is an amenable number.

888921 is a deficient number, since it is larger than the sum of its proper divisors (602919).

888921 is a wasteful number, since it uses less digits than its factorization.

888921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 128 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 888921 is about 942.8260709166. The cubic root of 888921 is about 96.1511291458.

It can be divided in two parts, 88 and 8921, that added together give a palindrome (9009).

The spelling of 888921 in words is "eight hundred eighty-eight thousand, nine hundred twenty-one".