42143123 has 8 divisors (see below), whose sum is σ = 46022256. Its totient is φ = 38272000.

The previous prime is 42143089. The next prime is 42143141. The reversal of 42143123 is 32134124.

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 42143123 - 2¹⁶ = 42077587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42143095 and 42143104.

It is not an unprimeable number, because it can be changed into a prime (42143183) 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, 16415 + ... + 18807.

It is an arithmetic number, because the mean of its divisors is an integer number (5752782).

Almost surely, 2^42143123 is an apocalyptic number.

42143123 is a deficient number, since it is larger than the sum of its proper divisors (3879133).

42143123 is a wasteful number, since it uses less digits than its factorization.

42143123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005.

The product of its digits is 576, while the sum is 20.

The square root of 42143123 is about 6491.7734864981. The cubic root of 42143123 is about 347.9970576005.

Adding to 42143123 its reverse (32134124), we get a palindrome (74277247).

It can be divided in two parts, 4214 and 3123, that added together give a palindrome (7337).

The spelling of 42143123 in words is "forty-two million, one hundred forty-three thousand, one hundred twenty-three".