43434145 has 4 divisors (see below), whose sum is σ = 52120980. Its totient is φ = 34747312.

The previous prime is 43434137. The next prime is 43434161. The reversal of 43434145 is 54143434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54143434 = 2 ⋅27071717.

It can be written as a sum of positive squares in 2 ways, for example, as 27973521 + 15460624 = 5289^2 + 3932^2 .

It is a cyclic number.

It is not a de Polignac number, because 43434145 - 2³ = 43434137 is a prime.

It is an alternating number because its digits alternate between even and odd.

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, 4343410 + ... + 4343419.

It is an arithmetic number, because the mean of its divisors is an integer number (13030245).

Almost surely, 2^43434145 is an apocalyptic number.

It is an amenable number.

43434145 is a deficient number, since it is larger than the sum of its proper divisors (8686835).

43434145 is an equidigital number, since it uses as much as digits as its factorization.

43434145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8686834.

The product of its digits is 11520, while the sum is 28.

The square root of 43434145 is about 6590.4586335095. The cubic root of 43434145 is about 351.5149164702.

Adding to 43434145 its reverse (54143434), we get a palindrome (97577579).

The spelling of 43434145 in words is "forty-three million, four hundred thirty-four thousand, one hundred forty-five".