43128161 has 8 divisors (see below), whose sum is σ = 44686848. Its totient is φ = 41580000.

The previous prime is 43128109. The next prime is 43128179. The reversal of 43128161 is 16182134.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43128161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43128161.

It is not an unprimeable number, because it can be changed into a prime (43128661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6236 + ... + 11186.

It is an arithmetic number, because the mean of its divisors is an integer number (5585856).

Almost surely, 2^43128161 is an apocalyptic number.

It is an amenable number.

43128161 is a deficient number, since it is larger than the sum of its proper divisors (1558687).

43128161 is a wasteful number, since it uses less digits than its factorization.

43128161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263.

The product of its digits is 1152, while the sum is 26.

The square root of 43128161 is about 6567.2034382985. The cubic root of 43128161 is about 350.6875220520.

The spelling of 43128161 in words is "forty-three million, one hundred twenty-eight thousand, one hundred sixty-one".