123100140 has 48 divisors (see below), whose sum is σ = 359670528. Its totient is φ = 31399104.

The previous prime is 123100139. The next prime is 123100169. The reversal of 123100140 is 41001321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43222 + ... + 45981.

It is an arithmetic number, because the mean of its divisors is an integer number (7493136).

Almost surely, 2^123100140 is an apocalyptic number.

123100140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100140 is an abundant number, since it is smaller than the sum of its proper divisors (236570388).

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

123100140 is a wasteful number, since it uses less digits than its factorization.

123100140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89238 (or 89236 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 123100140 is about 11095.0502477456. The cubic root of 123100140 is about 497.4539101937.

Adding to 123100140 its reverse (41001321), we get a palindrome (164101461).

The spelling of 123100140 in words is "one hundred twenty-three million, one hundred thousand, one hundred forty".