43542242 has 4 divisors (see below), whose sum is σ = 65313366. Its totient is φ = 21771120.

The previous prime is 43542221. The next prime is 43542251. The reversal of 43542242 is 24224534.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23030401 + 20511841 = 4799^2 + 4529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10885559 + ... + 10885562.

Almost surely, 2^43542242 is an apocalyptic number.

43542242 is a deficient number, since it is larger than the sum of its proper divisors (21771124).

43542242 is a wasteful number, since it uses less digits than its factorization.

43542242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21771123.

The product of its digits is 7680, while the sum is 26.

The square root of 43542242 is about 6598.6545598326. The cubic root of 43542242 is about 351.8062865363.

Adding to 43542242 its reverse (24224534), we get a palindrome (67766776).

The spelling of 43542242 in words is "forty-three million, five hundred forty-two thousand, two hundred forty-two".