42543100 has 72 divisors (see below), whose sum is σ = 98431200. Its totient is φ = 15924480.

The previous prime is 42543097. The next prime is 42543101. The reversal of 42543100 is 134524.

It is a super-2 number, since 2×42543100² = 3619830715220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121726 + ... + 122074.

It is an arithmetic number, because the mean of its divisors is an integer number (1367100).

Almost surely, 2^42543100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42543100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49215600).

42543100 is an abundant number, since it is smaller than the sum of its proper divisors (55888100).

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

42543100 is a wasteful number, since it uses less digits than its factorization.

42543100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42543100 is about 6522.5071866576. The cubic root of 42543100 is about 349.0945302671.

Adding to 42543100 its reverse (134524), we get a palindrome (42677624).

The spelling of 42543100 in words is "forty-two million, five hundred forty-three thousand, one hundred".