123530128 has 10 divisors (see below), whose sum is σ = 239339654. Its totient is φ = 61765056.

The previous prime is 123530117. The next prime is 123530149. The reversal of 123530128 is 821035321.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 59721984 = 7988^2 + 7728^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860301 + ... + 3860332.

Almost surely, 2^123530128 is an apocalyptic number.

It is an amenable number.

123530128 is a deficient number, since it is larger than the sum of its proper divisors (115809526).

123530128 is an equidigital number, since it uses as much as digits as its factorization.

123530128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7720641 (or 7720635 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 123530128 is about 11114.4108255904. The cubic root of 123530128 is about 498.0324382240.

Adding to 123530128 its reverse (821035321), we get a palindrome (944565449).

The spelling of 123530128 in words is "one hundred twenty-three million, five hundred thirty thousand, one hundred twenty-eight".