42545263 has 4 divisors (see below), whose sum is σ = 42870168. Its totient is φ = 42220360.

The previous prime is 42545221. The next prime is 42545287. The reversal of 42545263 is 36254524.

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 42545263 - 2²⁵ = 8990831 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42545663) 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, 162256 + ... + 162517.

It is an arithmetic number, because the mean of its divisors is an integer number (10717542).

Almost surely, 2^42545263 is an apocalyptic number.

42545263 is a deficient number, since it is larger than the sum of its proper divisors (324905).

42545263 is a wasteful number, since it uses less digits than its factorization.

42545263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324904.

The product of its digits is 28800, while the sum is 31.

The square root of 42545263 is about 6522.6729950228. The cubic root of 42545263 is about 349.1004464531.

Adding to 42545263 its reverse (36254524), we get a palindrome (78799787).

The spelling of 42545263 in words is "forty-two million, five hundred forty-five thousand, two hundred sixty-three".