123140144 has 40 divisors (see below), whose sum is σ = 248228160. Its totient is φ = 59125248.

The previous prime is 123140117. The next prime is 123140191. The reversal of 123140144 is 441041321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45452 + ... + 48084.

It is an arithmetic number, because the mean of its divisors is an integer number (6205704).

Almost surely, 2^123140144 is an apocalyptic number.

It is an amenable number.

123140144 is an abundant number, since it is smaller than the sum of its proper divisors (125088016).

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

123140144 is a wasteful number, since it uses less digits than its factorization.

123140144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 123140144 is about 11096.8528871928. The cubic root of 123140144 is about 497.5077904220.

Adding to 123140144 its reverse (441041321), we get a palindrome (564181465).

The spelling of 123140144 in words is "one hundred twenty-three million, one hundred forty thousand, one hundred forty-four".