123112140 has 48 divisors (see below), whose sum is σ = 345811200. Its totient is φ = 32725440.

The previous prime is 123112103. The next prime is 123112151. The reversal of 123112140 is 41211321.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16761 + ... + 22959.

It is an arithmetic number, because the mean of its divisors is an integer number (7204400).

Almost surely, 2^123112140 is an apocalyptic number.

123112140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123112140 is an abundant number, since it is smaller than the sum of its proper divisors (222699060).

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

123112140 is a wasteful number, since it uses less digits than its factorization.

123112140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542 (or 6540 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 123112140 is about 11095.5910162551. The cubic root of 123112140 is about 497.4700738714.

Adding to 123112140 its reverse (41211321), we get a palindrome (164323461).

The spelling of 123112140 in words is "one hundred twenty-three million, one hundred twelve thousand, one hundred forty".