123191552 has 108 divisors (see below), whose sum is σ = 279735708. Its totient is φ = 54067200.

The previous prime is 123191543. The next prime is 123191569. The reversal of 123191552 is 255191321.

It can be written as a sum of positive squares in 2 ways, for example, as 26050816 + 97140736 = 5104^2 + 9856^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1269968 + ... + 1270064.

Almost surely, 2^123191552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123191552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139867854).

123191552 is an abundant number, since it is smaller than the sum of its proper divisors (156544156).

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

123191552 is an equidigital number, since it uses as much as digits as its factorization.

123191552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 151 counting only the distinct ones).

The product of its digits is 2700, while the sum is 29.

The square root of 123191552 is about 11099.1689779010. The cubic root of 123191552 is about 497.5770132370.

The spelling of 123191552 in words is "one hundred twenty-three million, one hundred ninety-one thousand, five hundred fifty-two".