2143845 has 48 divisors (see below), whose sum is σ = 4178304. Its totient is φ = 1008000.

The previous prime is 2143837. The next prime is 2143847. The reversal of 2143845 is 5483412.

It is not a de Polignac number, because 2143845 - 2³ = 2143837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30160 + ... + 30230.

It is an arithmetic number, because the mean of its divisors is an integer number (87048).

2^2143845 is an apocalyptic number.

It is an amenable number.

2143845 is a deficient number, since it is larger than the sum of its proper divisors (2034459).

2143845 is a wasteful number, since it uses less digits than its factorization.

2143845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 151 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 2143845 is about 1464.1874879946. The cubic root of 2143845 is about 128.9430070936.

The spelling of 2143845 in words is "two million, one hundred forty-three thousand, eight hundred forty-five".