43421171 has 4 divisors (see below), whose sum is σ = 45309072. Its totient is φ = 41533272.

The previous prime is 43421167. The next prime is 43421197. The reversal of 43421171 is 17112434.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43421171 - 2² = 43421167 is a prime.

It is a super-2 number, since 2×43421171² = 3770796182022482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1887877 = 43421171 / (4 + 3 + 4 + 2 + 1 + 1 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43421071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943916 + ... + 943961.

It is an arithmetic number, because the mean of its divisors is an integer number (11327268).

Almost surely, 2^43421171 is an apocalyptic number.

43421171 is a deficient number, since it is larger than the sum of its proper divisors (1887901).

43421171 is a wasteful number, since it uses less digits than its factorization.

43421171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887900.

The product of its digits is 672, while the sum is 23.

The square root of 43421171 is about 6589.4742582394. The cubic root of 43421171 is about 351.4799132204.

The spelling of 43421171 in words is "forty-three million, four hundred twenty-one thousand, one hundred seventy-one".