2143671 has 4 divisors (see below), whose sum is σ = 2858232. Its totient is φ = 1429112.

The previous prime is 2143667. The next prime is 2143711. The reversal of 2143671 is 1763412.

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 2143671 - 2² = 2143667 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143621) 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, 357276 + ... + 357281.

It is an arithmetic number, because the mean of its divisors is an integer number (714558).

2^2143671 is an apocalyptic number.

2143671 is a deficient number, since it is larger than the sum of its proper divisors (714561).

2143671 is an equidigital number, since it uses as much as digits as its factorization.

2143671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714560.

The product of its digits is 1008, while the sum is 24.

The square root of 2143671 is about 1464.1280681689. The cubic root of 2143671 is about 128.9395185500.

The spelling of 2143671 in words is "two million, one hundred forty-three thousand, six hundred seventy-one".