42505043 has 4 divisors (see below), whose sum is σ = 48577200. Its totient is φ = 36432888.

The previous prime is 42505031. The next prime is 42505051. The reversal of 42505043 is 34050524.

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 42505043 - 2¹⁰ = 42504019 is a prime.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (42505003) 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 3 ways as a sum of consecutive naturals, for example, 3036068 + ... + 3036081.

It is an arithmetic number, because the mean of its divisors is an integer number (12144300).

Almost surely, 2^42505043 is an apocalyptic number.

42505043 is a deficient number, since it is larger than the sum of its proper divisors (6072157).

42505043 is an equidigital number, since it uses as much as digits as its factorization.

42505043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072156.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 42505043 is about 6519.5891741735. The cubic root of 42505043 is about 348.9904048506.

Adding to 42505043 its reverse (34050524), we get a palindrome (76555567).

The spelling of 42505043 in words is "forty-two million, five hundred five thousand, forty-three".