43642871 has 4 divisors (see below), whose sum is σ = 43662600. Its totient is φ = 43623144.

The previous prime is 43642861. The next prime is 43642873. The reversal of 43642871 is 17824634.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17824634 = 2 ⋅8912317.

It is a cyclic number.

It is not a de Polignac number, because 43642871 - 2¹⁰ = 43641847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43642873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6056 + ... + 11133.

It is an arithmetic number, because the mean of its divisors is an integer number (10915650).

Almost surely, 2^43642871 is an apocalyptic number.

43642871 is a deficient number, since it is larger than the sum of its proper divisors (19729).

43642871 is a wasteful number, since it uses less digits than its factorization.

43642871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19728.

The product of its digits is 32256, while the sum is 35.

The square root of 43642871 is about 6606.2751229418. The cubic root of 43642871 is about 352.0770938878.

The spelling of 43642871 in words is "forty-three million, six hundred forty-two thousand, eight hundred seventy-one".