123315020 has 12 divisors (see below), whose sum is σ = 258961584. Its totient is φ = 49326000.

The previous prime is 123315011. The next prime is 123315037. The reversal of 123315020 is 20513321.

It is a self number, because there is not a number n which added to its sum of digits gives 123315020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3082856 + ... + 3082895.

It is an arithmetic number, because the mean of its divisors is an integer number (21580132).

Almost surely, 2^123315020 is an apocalyptic number.

123315020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123315020 is an abundant number, since it is smaller than the sum of its proper divisors (135646564).

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

123315020 is a wasteful number, since it uses less digits than its factorization.

123315020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165760 (or 6165758 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 123315020 is about 11104.7296230030. The cubic root of 123315020 is about 497.7431889335.

Adding to 123315020 its reverse (20513321), we get a palindrome (143828341).

The spelling of 123315020 in words is "one hundred twenty-three million, three hundred fifteen thousand, twenty".