42540832 has 24 divisors (see below), whose sum is σ = 83897856. Its totient is φ = 21233472.

The previous prime is 42540793. The next prime is 42540833. The reversal of 42540832 is 23804524.

It is a self number, because there is not a number n which added to its sum of digits gives 42540832.

It is not an unprimeable number, because it can be changed into a prime (42540833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34173 + ... + 35395.

It is an arithmetic number, because the mean of its divisors is an integer number (3495744).

Almost surely, 2^42540832 is an apocalyptic number.

It is an amenable number.

42540832 is a deficient number, since it is larger than the sum of its proper divisors (41357024).

42540832 is a wasteful number, since it uses less digits than its factorization.

42540832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 42540832 is about 6522.3333248156. Note that the first 4 decimals coincide. The cubic root of 42540832 is about 349.0883266723.

It can be divided in two parts, 4 and 2540832, that added together give a square (2540836 = 1594²).

The spelling of 42540832 in words is "forty-two million, five hundred forty thousand, eight hundred thirty-two".