123043512 has 16 divisors (see below), whose sum is σ = 307608840. Its totient is φ = 41014496.

The previous prime is 123043507. The next prime is 123043513. The reversal of 123043512 is 215340321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123043513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2563383 + ... + 2563430.

Almost surely, 2^123043512 is an apocalyptic number.

123043512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123043512 is an abundant number, since it is smaller than the sum of its proper divisors (184565328).

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

123043512 is a wasteful number, since it uses less digits than its factorization.

123043512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126822 (or 5126818 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 123043512 is about 11092.4980054089. The cubic root of 123043512 is about 497.3776196207.

Adding to 123043512 its reverse (215340321), we get a palindrome (338383833).

The spelling of 123043512 in words is "one hundred twenty-three million, forty-three thousand, five hundred twelve".