43975145 has 4 divisors (see below), whose sum is σ = 52770180. Its totient is φ = 35180112.

The previous prime is 43975133. The next prime is 43975153. The reversal of 43975145 is 54157934.

43975145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54157934 = 2 ⋅27078967.

It can be written as a sum of positive squares in 2 ways, for example, as 9834496 + 34140649 = 3136^2 + 5843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43975145 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43975099 and 43975108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4397510 + ... + 4397519.

It is an arithmetic number, because the mean of its divisors is an integer number (13192545).

Almost surely, 2^43975145 is an apocalyptic number.

It is an amenable number.

43975145 is a deficient number, since it is larger than the sum of its proper divisors (8795035).

43975145 is an equidigital number, since it uses as much as digits as its factorization.

43975145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8795034.

The product of its digits is 75600, while the sum is 38.

The square root of 43975145 is about 6631.3757999377. The cubic root of 43975145 is about 352.9683461573.

The spelling of 43975145 in words is "forty-three million, nine hundred seventy-five thousand, one hundred forty-five".