42343621 has 8 divisors (see below), whose sum is σ = 44418240. Its totient is φ = 40288512.

The previous prime is 42343601. The next prime is 42343627. The reversal of 42343621 is 12634324.

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 42343621 - 2¹⁹ = 41819333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42343627) 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, 331 + ... + 9208.

It is an arithmetic number, because the mean of its divisors is an integer number (5552280).

Almost surely, 2^42343621 is an apocalyptic number.

It is an amenable number.

42343621 is a deficient number, since it is larger than the sum of its proper divisors (2074619).

42343621 is a wasteful number, since it uses less digits than its factorization.

42343621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9755.

The product of its digits is 3456, while the sum is 25.

The square root of 42343621 is about 6507.1976303168. The cubic root of 42343621 is about 348.5480558147.

Adding to 42343621 its reverse (12634324), we get a palindrome (54977945).

It can be divided in two parts, 423 and 43621, that added together give a palindrome (44044).

The spelling of 42343621 in words is "forty-two million, three hundred forty-three thousand, six hundred twenty-one".