42123423 has 8 divisors (see below), whose sum is σ = 56204928. Its totient is φ = 28062104.

The previous prime is 42123401. The next prime is 42123449. The reversal of 42123423 is 32432124.

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

It is a cyclic number.

It is not a de Polignac number, because 42123423 - 2¹² = 42119327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42123423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42123493) 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, 790 + ... + 9212.

It is an arithmetic number, because the mean of its divisors is an integer number (7025616).

Almost surely, 2^42123423 is an apocalyptic number.

42123423 is a deficient number, since it is larger than the sum of its proper divisors (14081505).

42123423 is a wasteful number, since it uses less digits than its factorization.

42123423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10093.

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

The square root of 42123423 is about 6490.2560041958. The cubic root of 42123423 is about 347.9428248650.

Adding to 42123423 its reverse (32432124), we get a palindrome (74555547).

The spelling of 42123423 in words is "forty-two million, one hundred twenty-three thousand, four hundred twenty-three".