921243 has 8 divisors (see below), whose sum is σ = 1270800. Its totient is φ = 592928.

The previous prime is 921241. The next prime is 921257. The reversal of 921243 is 342129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 921243 - 2¹ = 921241 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (921241) 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 7 ways as a sum of consecutive naturals, for example, 5208 + ... + 5381.

It is an arithmetic number, because the mean of its divisors is an integer number (158850).

2⁹²¹²⁴³ is an apocalyptic number.

921243 is a deficient number, since it is larger than the sum of its proper divisors (349557).

921243 is a wasteful number, since it uses less digits than its factorization.

921243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10621.

The product of its digits is 432, while the sum is 21.

The square root of 921243 is about 959.8140444899. The cubic root of 921243 is about 97.3026646459.

The spelling of 921243 in words is "nine hundred twenty-one thousand, two hundred forty-three".