42540528 has 80 divisors (see below), whose sum is σ = 119590560. Its totient is φ = 12976128.

The previous prime is 42540523. The next prime is 42540529. The reversal of 42540528 is 82504524.

It is a junction number, because it is equal to n+sod(n) for n = 42540495 and 42540504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42540523) 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, 29488 + ... + 30896.

It is an arithmetic number, because the mean of its divisors is an integer number (1494882).

Almost surely, 2^42540528 is an apocalyptic number.

42540528 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42540528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59795280).

42540528 is an abundant number, since it is smaller than the sum of its proper divisors (77050032).

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

42540528 is a wasteful number, since it uses less digits than its factorization.

42540528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 42540528 is about 6522.3100202306. The cubic root of 42540528 is about 349.0874951331.

The spelling of 42540528 in words is "forty-two million, five hundred forty thousand, five hundred twenty-eight".