43142540 has 96 divisors (see below), whose sum is σ = 111552000. Its totient is φ = 13970880.

The previous prime is 43142531. The next prime is 43142543. The reversal of 43142540 is 4524134.

It is a super-2 number, since 2×43142540² = 3722557515303200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43142543) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 130175 + ... + 130505.

It is an arithmetic number, because the mean of its divisors is an integer number (1162000).

Almost surely, 2^43142540 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 43142540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55776000).

43142540 is an abundant number, since it is smaller than the sum of its proper divisors (68409460).

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

43142540 is a wasteful number, since it uses less digits than its factorization.

43142540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 364 counting only the distinct ones).

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

The square root of 43142540 is about 6568.2981052933. The cubic root of 43142540 is about 350.7264909876.

Adding to 43142540 its reverse (4524134), we get a palindrome (47666674).

The spelling of 43142540 in words is "forty-three million, one hundred forty-two thousand, five hundred forty".