123230042 has 16 divisors (see below), whose sum is σ = 210774312. Its totient is φ = 53529600.

The previous prime is 123230039. The next prime is 123230047. The reversal of 123230042 is 240032321.

It can be written as a sum of positive squares in 4 ways, for example, as 119661721 + 3568321 = 10939^2 + 1889^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 123230042.

It is not an unprimeable number, because it can be changed into a prime (123230047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138959 + ... + 139842.

Almost surely, 2^123230042 is an apocalyptic number.

123230042 is a deficient number, since it is larger than the sum of its proper divisors (87544270).

123230042 is a wasteful number, since it uses less digits than its factorization.

123230042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278833.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123230042 is about 11100.9027560825. The cubic root of 123230042 is about 497.6288288707.

Adding to 123230042 its reverse (240032321), we get a palindrome (363262363).

The spelling of 123230042 in words is "one hundred twenty-three million, two hundred thirty thousand, forty-two".