43545442 has 8 divisors (see below), whose sum is σ = 65354076. Its totient is φ = 21760752.

The previous prime is 43545407. The next prime is 43545457. The reversal of 43545442 is 24454534.

It can be written as a sum of positive squares in 2 ways, for example, as 37933281 + 5612161 = 6159^2 + 2369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393 + ... + 9340.

Almost surely, 2^43545442 is an apocalyptic number.

43545442 is a deficient number, since it is larger than the sum of its proper divisors (21808634).

43545442 is a wasteful number, since it uses less digits than its factorization.

43545442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11972.

The product of its digits is 38400, while the sum is 31.

The square root of 43545442 is about 6598.8970290496. The cubic root of 43545442 is about 351.8149046237.

Adding to 43545442 its reverse (24454534), we get a palindrome (67999976).

The spelling of 43545442 in words is "forty-three million, five hundred forty-five thousand, four hundred forty-two".