42540272 has 20 divisors (see below), whose sum is σ = 82531176. Its totient is φ = 21241920.

The previous prime is 42540263. The next prime is 42540283. The reversal of 42540272 is 27204524.

It is a congruent number.

It is an unprimeable number.

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, 16238 + ... + 18674.

Almost surely, 2^42540272 is an apocalyptic number.

It is an amenable number.

42540272 is a deficient number, since it is larger than the sum of its proper divisors (39990904).

42540272 is a wasteful number, since it uses less digits than its factorization.

42540272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536 (or 3530 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 42540272 is about 6522.2903952523. The cubic root of 42540272 is about 349.0867948865.

Adding to 42540272 its reverse (27204524), we get a palindrome (69744796).

The spelling of 42540272 in words is "forty-two million, five hundred forty thousand, two hundred seventy-two".