123003240 has 64 divisors (see below), whose sum is σ = 374232960. Its totient is φ = 32336640.

The previous prime is 123003227. The next prime is 123003253. The reversal of 123003240 is 42300321.

It is an interprime number because it is at equal distance from previous prime (123003227) and next prime (123003253).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302 + ... + 15738.

It is an arithmetic number, because the mean of its divisors is an integer number (5847390).

Almost surely, 2^123003240 is an apocalyptic number.

123003240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123003240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187116480).

123003240 is an abundant number, since it is smaller than the sum of its proper divisors (251229720).

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

123003240 is a wasteful number, since it uses less digits than its factorization.

123003240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14522 (or 14518 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 123003240 is about 11090.6825759283. The cubic root of 123003240 is about 497.3233499918.

Adding to 123003240 its reverse (42300321), we get a palindrome (165303561).

The spelling of 123003240 in words is "one hundred twenty-three million, three thousand, two hundred forty".