42140423 has 8 divisors (see below), whose sum is σ = 47770800. Its totient is φ = 36851328.

The previous prime is 42140419. The next prime is 42140443. The reversal of 42140423 is 32404124.

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 42140423 - 2² = 42140419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42140395 and 42140404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42140443) 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, 85058 + ... + 85551.

It is an arithmetic number, because the mean of its divisors is an integer number (5971350).

Almost surely, 2^42140423 is an apocalyptic number.

42140423 is a deficient number, since it is larger than the sum of its proper divisors (5630377).

42140423 is a wasteful number, since it uses less digits than its factorization.

42140423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170641.

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

The square root of 42140423 is about 6491.5655276674. The cubic root of 42140423 is about 347.9896256871.

Adding to 42140423 its reverse (32404124), we get a palindrome (74544547).

The spelling of 42140423 in words is "forty-two million, one hundred forty thousand, four hundred twenty-three".