921288 has 32 divisors (see below), whose sum is σ = 2404800. Its totient is φ = 293568.

The previous prime is 921287. The next prime is 921293. The reversal of 921288 is 882129.

It is not an unprimeable number, because it can be changed into a prime (921287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283 + ... + 1386.

It is an arithmetic number, because the mean of its divisors is an integer number (75150).

2⁹²¹²⁸⁸ is an apocalyptic number.

It is an amenable number.

921288 is an abundant number, since it is smaller than the sum of its proper divisors (1483512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921288 is a wasteful number, since it uses less digits than its factorization.

921288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1697 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 921288 is about 959.8374862444. The cubic root of 921288 is about 97.3042489361.

The spelling of 921288 in words is "nine hundred twenty-one thousand, two hundred eighty-eight".