9123240 has 64 divisors (see below), whose sum is σ = 31282560. Its totient is φ = 2085120.

The previous prime is 9123239. The next prime is 9123251. The reversal of 9123240 is 423219.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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, 4591 + ... + 6270.

It is an arithmetic number, because the mean of its divisors is an integer number (488790).

Almost surely, 2^9123240 is an apocalyptic number.

It is an amenable number.

9123240 is an abundant number, since it is smaller than the sum of its proper divisors (22159320).

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

9123240 is a wasteful number, since it uses less digits than its factorization.

9123240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10882 (or 10878 counting only the distinct ones).

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

The square root of 9123240 is about 3020.4701620774. The cubic root of 9123240 is about 208.9535240018.

Subtracting from 9123240 its sum of digits (21), we obtain a palindrome (9123219).

Adding to 9123240 its reverse (423219), we get a palindrome (9546459).

The spelling of 9123240 in words is "nine million, one hundred twenty-three thousand, two hundred forty".