42545523 has 16 divisors (see below), whose sum is σ = 60274080. Its totient is φ = 26643456.

The previous prime is 42545507. The next prime is 42545539. The reversal of 42545523 is 32554524.

It is an interprime number because it is at equal distance from previous prime (42545507) and next prime (42545539).

It is not a de Polignac number, because 42545523 - 2⁴ = 42545507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42545593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3390 + ... + 9827.

It is an arithmetic number, because the mean of its divisors is an integer number (3767130).

Almost surely, 2^42545523 is an apocalyptic number.

42545523 is a deficient number, since it is larger than the sum of its proper divisors (17728557).

42545523 is a wasteful number, since it uses less digits than its factorization.

42545523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13286.

The product of its digits is 24000, while the sum is 30.

The square root of 42545523 is about 6522.6929254718. The cubic root of 42545523 is about 349.1011575854.

Subtracting from 42545523 its reverse (32554524), we obtain a palindrome (9990999).

The spelling of 42545523 in words is "forty-two million, five hundred forty-five thousand, five hundred twenty-three".