123204140 has 24 divisors (see below), whose sum is σ = 262972752. Its totient is φ = 48473280.

The previous prime is 123204131. The next prime is 123204161. The reversal of 123204140 is 41402321.

It is a super-2 number, since 2×123204140² = 30358520226279200, which contains 22 as substring.

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, 49274 + ... + 51713.

It is an arithmetic number, because the mean of its divisors is an integer number (10957198).

Almost surely, 2^123204140 is an apocalyptic number.

123204140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123204140 is an abundant number, since it is smaller than the sum of its proper divisors (139768612).

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

123204140 is a wasteful number, since it uses less digits than its factorization.

123204140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101057 (or 101055 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 123204140 is about 11099.7360328974. The cubic root of 123204140 is about 497.5939605195.

Adding to 123204140 its reverse (41402321), we get a palindrome (164606461).

The spelling of 123204140 in words is "one hundred twenty-three million, two hundred four thousand, one hundred forty".