42543500 has 24 divisors (see below), whose sum is σ = 92916096. Its totient is φ = 17017200.

The previous prime is 42543481. The next prime is 42543509. The reversal of 42543500 is 534524.

It is not an unprimeable number, because it can be changed into a prime (42543509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42044 + ... + 43043.

It is an arithmetic number, because the mean of its divisors is an integer number (3871504).

Almost surely, 2^42543500 is an apocalyptic number.

It is an amenable number.

42543500 is an abundant number, since it is smaller than the sum of its proper divisors (50372596).

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

42543500 is a wasteful number, since it uses less digits than its factorization.

42543500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85106 (or 85094 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 42543500 is about 6522.5378496410. The cubic root of 42543500 is about 349.0956243527.

The spelling of 42543500 in words is "forty-two million, five hundred forty-three thousand, five hundred".