921876 has 24 divisors (see below), whose sum is σ = 2278080. Its totient is φ = 289152.

The previous prime is 921871. The next prime is 921887. The reversal of 921876 is 678129.

921876 = T₂₄ + T₂₅ + ... + T₁₇₆.

It is a super-4 number, since 4×921876⁴ (a number of 25 digits) contains 4444 as substring.

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

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 2056 + ... + 2463.

It is an arithmetic number, because the mean of its divisors is an integer number (94920).

2⁹²¹⁸⁷⁶ is an apocalyptic number.

It is an amenable number.

921876 is an abundant number, since it is smaller than the sum of its proper divisors (1356204).

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

921876 is a wasteful number, since it uses less digits than its factorization.

921876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543 (or 4541 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 921876 is about 960.1437392391. The cubic root of 921876 is about 97.3249455877.

The spelling of 921876 in words is "nine hundred twenty-one thousand, eight hundred seventy-six".