43139161 has 8 divisors (see below), whose sum is σ = 46680704. Its totient is φ = 39629520.

The previous prime is 43139143. The next prime is 43139189. The reversal of 43139161 is 16193134.

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

It is a cyclic number.

It is not a de Polignac number, because 43139161 - 2¹¹ = 43137113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43139111) 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, 5121 + ... + 10606.

It is an arithmetic number, because the mean of its divisors is an integer number (5835088).

Almost surely, 2^43139161 is an apocalyptic number.

It is an amenable number.

43139161 is a deficient number, since it is larger than the sum of its proper divisors (3541543).

43139161 is a wasteful number, since it uses less digits than its factorization.

43139161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15951.

The product of its digits is 1944, while the sum is 28.

The square root of 43139161 is about 6568.0408798971. The cubic root of 43139161 is about 350.7173342423.

The spelling of 43139161 in words is "forty-three million, one hundred thirty-nine thousand, one hundred sixty-one".