2145943 has 4 divisors (see below), whose sum is σ = 2178040. Its totient is φ = 2113848.

The previous prime is 2145937. The next prime is 2145953. The reversal of 2145943 is 3495412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145943 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 (2145953) 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, 15948 + ... + 16081.

It is an arithmetic number, because the mean of its divisors is an integer number (544510).

2^2145943 is an apocalyptic number.

2145943 is a deficient number, since it is larger than the sum of its proper divisors (32097).

2145943 is an equidigital number, since it uses as much as digits as its factorization.

2145943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32096.

The product of its digits is 4320, while the sum is 28.

The square root of 2145943 is about 1464.9037511045. The cubic root of 2145943 is about 128.9850552565.

The spelling of 2145943 in words is "two million, one hundred forty-five thousand, nine hundred forty-three".