123043140 has 72 divisors (see below), whose sum is σ = 407167488. Its totient is φ = 29828160.

The previous prime is 123043139. The next prime is 123043147. The reversal of 123043140 is 41340321.

123043140 is a `hidden beast` number, since 1 + 230 + 431 + 4 + 0 = 666.

It is a super-2 number, since 2×123043140² = 30279228602119200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (123043147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29092 + ... + 33051.

It is an arithmetic number, because the mean of its divisors is an integer number (5655104).

Almost surely, 2^123043140 is an apocalyptic number.

123043140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123043140 is an abundant number, since it is smaller than the sum of its proper divisors (284124348).

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

123043140 is a wasteful number, since it uses less digits than its factorization.

123043140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62169 (or 62164 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 123043140 is about 11092.4812373066. The cubic root of 123043140 is about 497.3771183762.

Adding to 123043140 its reverse (41340321), we get a palindrome (164383461).

The spelling of 123043140 in words is "one hundred twenty-three million, forty-three thousand, one hundred forty".