123135552 has 70 divisors (see below), whose sum is σ = 365027718. Its totient is φ = 41043456.

The previous prime is 123135547. The next prime is 123135553. The reversal of 123135552 is 255531321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 113550336 + 9585216 = 10656^2 + 3096^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123135553) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 6693 + ... + 17060.

Almost surely, 2^123135552 is an apocalyptic number.

123135552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123135552 is an abundant number, since it is smaller than the sum of its proper divisors (241892166).

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

123135552 is an equidigital number, since it uses as much as digits as its factorization.

123135552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23777 (or 23758 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 123135552 is about 11096.6459797544. The cubic root of 123135552 is about 497.5016061832.

Adding to 123135552 its reverse (255531321), we get a palindrome (378666873).

The spelling of 123135552 in words is "one hundred twenty-three million, one hundred thirty-five thousand, five hundred fifty-two".