42344321 has 12 divisors (see below), whose sum is σ = 44824020. Its totient is φ = 39953760.

The previous prime is 42344273. The next prime is 42344327. The reversal of 42344321 is 12344324.

It can be written as a sum of positive squares in 2 ways, for example, as 28206721 + 14137600 = 5311^2 + 3760^2 .

It is not a de Polignac number, because 42344321 - 2¹⁴ = 42327937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42344327) 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 11 ways as a sum of consecutive naturals, for example, 63731 + ... + 64391.

It is an arithmetic number, because the mean of its divisors is an integer number (3735335).

Almost surely, 2^42344321 is an apocalyptic number.

It is an amenable number.

42344321 is a deficient number, since it is larger than the sum of its proper divisors (2479699).

42344321 is an equidigital number, since it uses as much as digits as its factorization.

42344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 737 counting only the distinct ones).

The product of its digits is 2304, while the sum is 23.

The square root of 42344321 is about 6507.2514166889. The cubic root of 42344321 is about 348.5499764684.

Adding to 42344321 its reverse (12344324), we get a palindrome (54688645).

It can be divided in two parts, 423 and 44321, that added together give a palindrome (44744).

The spelling of 42344321 in words is "forty-two million, three hundred forty-four thousand, three hundred twenty-one".