2163842 has 8 divisors (see below), whose sum is σ = 3256956. Its totient is φ = 1078192.

The previous prime is 2163829. The next prime is 2163851. The reversal of 2163842 is 2483612.

It is a Cunningham number, because it is equal to 1471²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 2163841 + 1 = 1471^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073 + ... + 2340.

2^2163842 is an apocalyptic number.

2163842 is a deficient number, since it is larger than the sum of its proper divisors (1093114).

2163842 is a wasteful number, since it uses less digits than its factorization.

2163842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732.

The product of its digits is 2304, while the sum is 26.

The square root of 2163842 is about 1471.0003399048. Note that the first 3 decimals coincide. The cubic root of 2163842 is about 129.3426780249.

The spelling of 2163842 in words is "two million, one hundred sixty-three thousand, eight hundred forty-two".