42123242 has 24 divisors (see below), whose sum is σ = 75493764. Its totient is φ = 17563392.

The previous prime is 42123239. The next prime is 42123259. The reversal of 42123242 is 24232124.

It can be written as a sum of positive squares in 2 ways, for example, as 41203561 + 919681 = 6419^2 + 959^2 .

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2183 + ... + 9434.

Almost surely, 2^42123242 is an apocalyptic number.

42123242 is a deficient number, since it is larger than the sum of its proper divisors (33370522).

42123242 is a wasteful number, since it uses less digits than its factorization.

42123242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11670 (or 11663 counting only the distinct ones).

The product of its digits is 768, while the sum is 20.

The square root of 42123242 is about 6490.2420602008. The cubic root of 42123242 is about 347.9423265062.

Adding to 42123242 its reverse (24232124), we get a palindrome (66355366).

The spelling of 42123242 in words is "forty-two million, one hundred twenty-three thousand, two hundred forty-two".