42142321 has 8 divisors (see below), whose sum is σ = 45440640. Its totient is φ = 38852112.

The previous prime is 42142319. The next prime is 42142327. The reversal of 42142321 is 12324124.

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

It is not a de Polignac number, because 42142321 - 2¹ = 42142319 is a prime.

It is a super-3 number, since 3×42142321³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42142327) 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, 12870 + ... + 15808.

It is an arithmetic number, because the mean of its divisors is an integer number (5680080).

Almost surely, 2^42142321 is an apocalyptic number.

It is an amenable number.

42142321 is a deficient number, since it is larger than the sum of its proper divisors (3298319).

42142321 is a wasteful number, since it uses less digits than its factorization.

42142321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055.

The product of its digits is 384, while the sum is 19.

The square root of 42142321 is about 6491.7117157187. The cubic root of 42142321 is about 347.9948500801.

Adding to 42142321 its reverse (12324124), we get a palindrome (54466445).

The spelling of 42142321 in words is "forty-two million, one hundred forty-two thousand, three hundred twenty-one".