43540242 has 32 divisors (see below), whose sum is σ = 92596608. Its totient is φ = 13618176.

The previous prime is 43540187. The next prime is 43540243. The reversal of 43540242 is 24204534.

It is not an unprimeable number, because it can be changed into a prime (43540243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4338 + ... + 10290.

It is an arithmetic number, because the mean of its divisors is an integer number (2893644).

Almost surely, 2^43540242 is an apocalyptic number.

43540242 is an abundant number, since it is smaller than the sum of its proper divisors (49056366).

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

43540242 is a wasteful number, since it uses less digits than its factorization.

43540242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6034.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 43540242 is about 6598.5030120475. The cubic root of 43540242 is about 351.8009000172.

Adding to 43540242 its reverse (24204534), we get a palindrome (67744776).

The spelling of 43540242 in words is "forty-three million, five hundred forty thousand, two hundred forty-two".