42408043 has 4 divisors (see below), whose sum is σ = 42463960. Its totient is φ = 42352128.

The previous prime is 42408029. The next prime is 42408049. The reversal of 42408043 is 34080424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42408043 - 2⁵ = 42408011 is a prime.

It is a super-2 number, since 2×42408043² = 3596884222179698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42407999 and 42408017.

It is not an unprimeable number, because it can be changed into a prime (42408049) 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, 26805 + ... + 28342.

It is an arithmetic number, because the mean of its divisors is an integer number (10615990).

Almost surely, 2^42408043 is an apocalyptic number.

42408043 is a deficient number, since it is larger than the sum of its proper divisors (55917).

42408043 is an equidigital number, since it uses as much as digits as its factorization.

42408043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55916.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 42408043 is about 6512.1458061072. The cubic root of 42408043 is about 348.7247277242.

Adding to 42408043 its reverse (34080424), we get a palindrome (76488467).

The spelling of 42408043 in words is "forty-two million, four hundred eight thousand, forty-three".