2142243 has 24 divisors (see below), whose sum is σ = 3294720. Its totient is φ = 1338480.

The previous prime is 2142241. The next prime is 2142251. The reversal of 2142243 is 3422412.

It is not a de Polignac number, because 2142243 - 2¹ = 2142241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2142241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16288 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (137280).

2^2142243 is an apocalyptic number.

2142243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2142243 is a deficient number, since it is larger than the sum of its proper divisors (1152477).

2142243 is a wasteful number, since it uses less digits than its factorization.

2142243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 236 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 2142243 is about 1463.6403246700. The cubic root of 2142243 is about 128.9108812992.

Adding to 2142243 its reverse (3422412), we get a palindrome (5564655).

The spelling of 2142243 in words is "two million, one hundred forty-two thousand, two hundred forty-three".