42405343 has 4 divisors (see below), whose sum is σ = 42419520. Its totient is φ = 42391168.

The previous prime is 42405329. The next prime is 42405347. The reversal of 42405343 is 34350424.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42405343 is a prime.

It is a super-2 number, since 2×42405343² = 3596426229895298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42405347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655 + ... + 9232.

It is an arithmetic number, because the mean of its divisors is an integer number (10604880).

Almost surely, 2^42405343 is an apocalyptic number.

42405343 is a deficient number, since it is larger than the sum of its proper divisors (14177).

42405343 is an equidigital number, since it uses as much as digits as its factorization.

42405343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14176.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 42405343 is about 6511.9384978668. The cubic root of 42405343 is about 348.7173267952.

Adding to 42405343 its reverse (34350424), we get a palindrome (76755767).

The spelling of 42405343 in words is "forty-two million, four hundred five thousand, three hundred forty-three".