9121854 has 32 divisors (see below), whose sum is σ = 21298176. Its totient is φ = 2550240.

The previous prime is 9121841. The next prime is 9121859. The reversal of 9121854 is 4581219.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9121859) 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 15 ways as a sum of consecutive naturals, for example, 337 + ... + 4284.

It is an arithmetic number, because the mean of its divisors is an integer number (665568).

Almost surely, 2^9121854 is an apocalyptic number.

9121854 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

9121854 is an abundant number, since it is smaller than the sum of its proper divisors (12176322).

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

9121854 is a wasteful number, since it uses less digits than its factorization.

9121854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680.

The product of its digits is 2880, while the sum is 30.

The square root of 9121854 is about 3020.2407188832. The cubic root of 9121854 is about 208.9429420795.

It can be divided in two parts, 91 and 21854, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 9121854 in words is "nine million, one hundred twenty-one thousand, eight hundred fifty-four".