123145320 has 64 divisors (see below), whose sum is σ = 370448640. Its totient is φ = 32748800.

The previous prime is 123145313. The next prime is 123145333. The reversal of 123145320 is 23541321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50530 + ... + 52910.

It is an arithmetic number, because the mean of its divisors is an integer number (5788260).

Almost surely, 2^123145320 is an apocalyptic number.

123145320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123145320 is an abundant number, since it is smaller than the sum of its proper divisors (247303320).

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

123145320 is a wasteful number, since it uses less digits than its factorization.

123145320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826 (or 2822 counting only the distinct ones).

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

The square root of 123145320 is about 11097.0861040185. The cubic root of 123145320 is about 497.5147609738.

Adding to 123145320 its reverse (23541321), we get a palindrome (146686641).

The spelling of 123145320 in words is "one hundred twenty-three million, one hundred forty-five thousand, three hundred twenty".