123135755 has 4 divisors (see below), whose sum is σ = 147762912. Its totient is φ = 98508600.

The previous prime is 123135739. The next prime is 123135757. The reversal of 123135755 is 557531321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123135755 - 2⁴ = 123135739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123135757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12313571 + ... + 12313580.

It is an arithmetic number, because the mean of its divisors is an integer number (36940728).

Almost surely, 2^123135755 is an apocalyptic number.

123135755 is a deficient number, since it is larger than the sum of its proper divisors (24627157).

123135755 is an equidigital number, since it uses as much as digits as its factorization.

123135755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24627156.

The product of its digits is 15750, while the sum is 32.

The square root of 123135755 is about 11096.6551266587. The cubic root of 123135755 is about 497.5018795751.

The spelling of 123135755 in words is "one hundred twenty-three million, one hundred thirty-five thousand, seven hundred fifty-five".