43042140 has 144 divisors (see below), whose sum is σ = 137225088. Its totient is φ = 10910592.

The previous prime is 43042133. The next prime is 43042159. The reversal of 43042140 is 4124034.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 47 ways as a sum of consecutive naturals, for example, 518539 + ... + 518621.

It is an arithmetic number, because the mean of its divisors is an integer number (952952).

Almost surely, 2^43042140 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 43042140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68612544).

43042140 is an abundant number, since it is smaller than the sum of its proper divisors (94182948).

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

43042140 is a wasteful number, since it uses less digits than its factorization.

43042140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 43042140 is about 6560.6508823439. The cubic root of 43042140 is about 350.4542130105.

Adding to 43042140 its reverse (4124034), we get a palindrome (47166174).

The spelling of 43042140 in words is "forty-three million, forty-two thousand, one hundred forty".