42511540 has 24 divisors (see below), whose sum is σ = 92155392. Its totient is φ = 16455840.

The previous prime is 42511537. The next prime is 42511589. The reversal of 42511540 is 4511524.

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 7 ways as a sum of consecutive naturals, for example, 33664 + ... + 34903.

It is an arithmetic number, because the mean of its divisors is an integer number (3839808).

Almost surely, 2^42511540 is an apocalyptic number.

It is an amenable number.

42511540 is an abundant number, since it is smaller than the sum of its proper divisors (49643852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42511540 is a wasteful number, since it uses less digits than its factorization.

42511540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68607 (or 68605 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 42511540 is about 6520.0874227268. The cubic root of 42511540 is about 349.0081852909.

The spelling of 42511540 in words is "forty-two million, five hundred eleven thousand, five hundred forty".