2112643 has 8 divisors (see below), whose sum is σ = 2291408. Its totient is φ = 1936224.

The previous prime is 2112631. The next prime is 2112683. The reversal of 2112643 is 3462112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112643 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 1 + 2²¹ + 6⁵ + 4⁵ + 3⁸ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112643.

It is not an unprimeable number, because it can be changed into a prime (2112683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1621 + ... + 2617.

It is an arithmetic number, because the mean of its divisors is an integer number (286426).

2^2112643 is an apocalyptic number.

2112643 is a deficient number, since it is larger than the sum of its proper divisors (178765).

2112643 is a wasteful number, since it uses less digits than its factorization.

2112643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173.

The product of its digits is 288, while the sum is 19.

The square root of 2112643 is about 1453.4933780379. The cubic root of 2112643 is about 128.3143923621.

Adding to 2112643 its reverse (3462112), we get a palindrome (5574755).

The spelling of 2112643 in words is "two million, one hundred twelve thousand, six hundred forty-three".