2145843 has 12 divisors (see below), whose sum is σ = 3542448. Its totient is φ = 1226160.

The previous prime is 2145839. The next prime is 2145853. The reversal of 2145843 is 3485412.

2145843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2145843 - 2² = 2145839 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

2145843 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2145823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16968 + ... + 17093.

It is an arithmetic number, because the mean of its divisors is an integer number (295204).

2^2145843 is an apocalyptic number.

2145843 is a deficient number, since it is larger than the sum of its proper divisors (1396605).

2145843 is a wasteful number, since it uses less digits than its factorization.

2145843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34074 (or 34071 counting only the distinct ones).

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

The square root of 2145843 is about 1464.8696187716. The cubic root of 2145843 is about 128.9830516764.

The spelling of 2145843 in words is "two million, one hundred forty-five thousand, eight hundred forty-three".