123320500 has 24 divisors (see below), whose sum is σ = 269333064. Its totient is φ = 49328000.

The previous prime is 123320473. The next prime is 123320521. The reversal of 123320500 is 5023321.

It can be written as a sum of positive squares in 4 ways, for example, as 2056356 + 121264144 = 1434^2 + 11012^2 .

It is a congruent number.

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, 122821 + ... + 123820.

It is an arithmetic number, because the mean of its divisors is an integer number (11222211).

Almost surely, 2^123320500 is an apocalyptic number.

123320500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123320500 is an abundant number, since it is smaller than the sum of its proper divisors (146012564).

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

123320500 is a wasteful number, since it uses less digits than its factorization.

123320500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246660 (or 246648 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 123320500 is about 11104.9763619739. The cubic root of 123320500 is about 497.7505618993.

Adding to 123320500 its reverse (5023321), we get a palindrome (128343821).

The spelling of 123320500 in words is "one hundred twenty-three million, three hundred twenty thousand, five hundred".