43542140 has 24 divisors (see below), whose sum is σ = 91679280. Its totient is φ = 17371008.

The previous prime is 43542139. The next prime is 43542157. The reversal of 43542140 is 4124534.

43542140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5519 + ... + 10841.

It is an arithmetic number, because the mean of its divisors is an integer number (3819970).

Almost surely, 2^43542140 is an apocalyptic number.

It is an amenable number.

43542140 is an abundant number, since it is smaller than the sum of its proper divisors (48137140).

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

43542140 is a wasteful number, since it uses less digits than its factorization.

43542140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741 (or 5739 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 43542140 is about 6598.6468309798. The cubic root of 43542140 is about 351.8060118278.

Adding to 43542140 its reverse (4124534), we get a palindrome (47666674).

The spelling of 43542140 in words is "forty-three million, five hundred forty-two thousand, one hundred forty".