42123012 has 24 divisors (see below), whose sum is σ = 98431200. Its totient is φ = 14020416.

The previous prime is 42122999. The next prime is 42123013. The reversal of 42123012 is 21032124.

It is a junction number, because it is equal to n+sod(n) for n = 42122982 and 42123000.

It is not an unprimeable number, because it can be changed into a prime (42123013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7539 + ... + 11877.

It is an arithmetic number, because the mean of its divisors is an integer number (4101300).

Almost surely, 2^42123012 is an apocalyptic number.

It is an amenable number.

42123012 is an abundant number, since it is smaller than the sum of its proper divisors (56308188).

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

42123012 is a wasteful number, since it uses less digits than its factorization.

42123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155 (or 5153 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 42123012 is about 6490.2243412690. The cubic root of 42123012 is about 347.9416932304.

Adding to 42123012 its reverse (21032124), we get a palindrome (63155136).

The spelling of 42123012 in words is "forty-two million, one hundred twenty-three thousand, twelve".