42342321 has 16 divisors (see below), whose sum is σ = 65840000. Its totient is φ = 24195024.

The previous prime is 42342301. The next prime is 42342323. The reversal of 42342321 is 12324324.

It is not a de Polignac number, because 42342321 - 2¹⁰ = 42341297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42342323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19546 + ... + 21603.

It is an arithmetic number, because the mean of its divisors is an integer number (4115000).

Almost surely, 2^42342321 is an apocalyptic number.

It is an amenable number.

42342321 is a deficient number, since it is larger than the sum of its proper divisors (23497679).

42342321 is an equidigital number, since it uses as much as digits as its factorization.

42342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41173 (or 41159 counting only the distinct ones).

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

The square root of 42342321 is about 6507.0977401604. The cubic root of 42342321 is about 348.5444888302.

Adding to 42342321 its reverse (12324324), we get a palindrome (54666645).

It can be divided in two parts, 4234 and 2321, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 42342321 in words is "forty-two million, three hundred forty-two thousand, three hundred twenty-one".