42544525 has 12 divisors (see below), whose sum is σ = 52933492. Its totient is φ = 33920640.

The previous prime is 42544519. The next prime is 42544543. The reversal of 42544525 is 52544524.

It can be written as a sum of positive squares in 6 ways, for example, as 8462281 + 34082244 = 2909^2 + 5838^2 .

It is not a de Polignac number, because 42544525 - 2³ = 42544517 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5107 + ... + 10543.

Almost surely, 2^42544525 is an apocalyptic number.

It is an amenable number.

42544525 is a deficient number, since it is larger than the sum of its proper divisors (10388967).

42544525 is a wasteful number, since it uses less digits than its factorization.

42544525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760 (or 5755 counting only the distinct ones).

The product of its digits is 32000, while the sum is 31.

The square root of 42544525 is about 6522.6164228782. The cubic root of 42544525 is about 349.0984279156.

Subtracting 42544525 from its reverse (52544524), we obtain a palindrome (9999999).

The spelling of 42544525 in words is "forty-two million, five hundred forty-four thousand, five hundred twenty-five".