123305242 has 8 divisors (see below), whose sum is σ = 188447796. Its totient is φ = 60489312.

The previous prime is 123305227. The next prime is 123305243. The reversal of 123305242 is 242503321.

It can be written as a sum of positive squares in 2 ways, for example, as 122744241 + 561001 = 11079^2 + 749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (123305243) 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, 581523 + ... + 581734.

Almost surely, 2^123305242 is an apocalyptic number.

123305242 is a deficient number, since it is larger than the sum of its proper divisors (65142554).

123305242 is a wasteful number, since it uses less digits than its factorization.

123305242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163312.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 123305242 is about 11104.2893514173. The cubic root of 123305242 is about 497.7300327596.

Adding to 123305242 its reverse (242503321), we get a palindrome (365808563).

The spelling of 123305242 in words is "one hundred twenty-three million, three hundred five thousand, two hundred forty-two".