123403242 has 16 divisors (see below), whose sum is σ = 247121280. Its totient is φ = 41081952.

The previous prime is 123403237. The next prime is 123403243. The reversal of 123403242 is 242304321.

It is a super-2 number, since 2×123403242² = 30456720272221128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123403243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7858 + ... + 17565.

It is an arithmetic number, because the mean of its divisors is an integer number (15445080).

Almost surely, 2^123403242 is an apocalyptic number.

123403242 is an abundant number, since it is smaller than the sum of its proper divisors (123718038).

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

123403242 is a wasteful number, since it uses less digits than its factorization.

123403242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26237.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 123403242 is about 11108.7011842069. The cubic root of 123403242 is about 497.8618590732.

Adding to 123403242 its reverse (242304321), we get a palindrome (365707563).

The spelling of 123403242 in words is "one hundred twenty-three million, four hundred three thousand, two hundred forty-two".