43270145 has 4 divisors (see below), whose sum is σ = 51924180. Its totient is φ = 34616112.

The previous prime is 43270121. The next prime is 43270177. The reversal of 43270145 is 54107234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54107234 = 2 ⋅27053617.

It can be written as a sum of positive squares in 2 ways, for example, as 17372224 + 25897921 = 4168^2 + 5089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43270145 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, 4327010 + ... + 4327019.

It is an arithmetic number, because the mean of its divisors is an integer number (12981045).

It is a Proth number, since it is equal to 2641 ⋅ 2¹⁴ + 1 and 2641 < 2¹⁴.

Almost surely, 2^43270145 is an apocalyptic number.

It is an amenable number.

43270145 is a deficient number, since it is larger than the sum of its proper divisors (8654035).

43270145 is an equidigital number, since it uses as much as digits as its factorization.

43270145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8654034.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 43270145 is about 6578.0046366660. The cubic root of 43270145 is about 351.0719381343.

Adding to 43270145 its reverse (54107234), we get a palindrome (97377379).

The spelling of 43270145 in words is "forty-three million, two hundred seventy thousand, one hundred forty-five".