123321504 has 48 divisors (see below), whose sum is σ = 329041440. Its totient is φ = 40431360.

The previous prime is 123321461. The next prime is 123321511. The reversal of 123321504 is 405123321.

It is a tau number, because it is divible by the number of its divisors (48).

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, 4674 + ... + 16385.

It is an arithmetic number, because the mean of its divisors is an integer number (6855030).

Almost surely, 2^123321504 is an apocalyptic number.

It is an amenable number.

123321504 is an abundant number, since it is smaller than the sum of its proper divisors (205719936).

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

123321504 is a wasteful number, since it uses less digits than its factorization.

123321504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21133 (or 21125 counting only the distinct ones).

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

The square root of 123321504 is about 11105.0215668408. The cubic root of 123321504 is about 497.7519126890.

Adding to 123321504 its reverse (405123321), we get a palindrome (528444825).

The spelling of 123321504 in words is "one hundred twenty-three million, three hundred twenty-one thousand, five hundred four".