921874 has 4 divisors (see below), whose sum is σ = 1382814. Its totient is φ = 460936.

The previous prime is 921871. The next prime is 921887. The reversal of 921874 is 478129.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 822649 + 99225 = 907^2 + 315^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (921871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230467 + ... + 230470.

2⁹²¹⁸⁷⁴ is an apocalyptic number.

921874 is a deficient number, since it is larger than the sum of its proper divisors (460940).

921874 is a wasteful number, since it uses less digits than its factorization.

921874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460939.

The product of its digits is 4032, while the sum is 31.

The square root of 921874 is about 960.1426977278. The cubic root of 921874 is about 97.3248752059.

The spelling of 921874 in words is "nine hundred twenty-one thousand, eight hundred seventy-four".