123321604 has 96 divisors (see below), whose sum is σ = 274337280. Its totient is φ = 47308800.

The previous prime is 123321557. The next prime is 123321631. The reversal of 123321604 is 406123321.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1385592 + ... + 1385680.

It is an arithmetic number, because the mean of its divisors is an integer number (2857680).

Almost surely, 2^123321604 is an apocalyptic number.

123321604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123321604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137168640).

123321604 is an abundant number, since it is smaller than the sum of its proper divisors (151015676).

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

123321604 is a wasteful number, since it uses less digits than its factorization.

123321604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 123321604 is about 11105.0260693075. The cubic root of 123321604 is about 497.7520472294.

Adding to 123321604 its reverse (406123321), we get a palindrome (529444925).

The spelling of 123321604 in words is "one hundred twenty-three million, three hundred twenty-one thousand, six hundred four".