43354642 has 4 divisors (see below), whose sum is σ = 65031966. Its totient is φ = 21677320.

The previous prime is 43354579. The next prime is 43354643. The reversal of 43354642 is 24645334.

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., 30459361 + 12895281 = 5519^2 + 3591^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (43354643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10838659 + ... + 10838662.

Almost surely, 2^43354642 is an apocalyptic number.

43354642 is a deficient number, since it is larger than the sum of its proper divisors (21677324).

43354642 is a wasteful number, since it uses less digits than its factorization.

43354642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21677323.

The product of its digits is 34560, while the sum is 31.

The square root of 43354642 is about 6584.4241965414. The cubic root of 43354642 is about 351.3003114316.

Adding to 43354642 its reverse (24645334), we get a palindrome (67999976).

The spelling of 43354642 in words is "forty-three million, three hundred fifty-four thousand, six hundred forty-two".