2146643 has 4 divisors (see below), whose sum is σ = 2161200. Its totient is φ = 2132088.

The previous prime is 2146633. The next prime is 2146663. The reversal of 2146643 is 3466412.

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

It is a cyclic number.

It is not a de Polignac number, because 2146643 - 2⁸ = 2146387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2146633) 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, 7055 + ... + 7352.

It is an arithmetic number, because the mean of its divisors is an integer number (540300).

2^2146643 is an apocalyptic number.

2146643 is a deficient number, since it is larger than the sum of its proper divisors (14557).

2146643 is a wasteful number, since it uses less digits than its factorization.

2146643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14556.

The product of its digits is 3456, while the sum is 26.

The square root of 2146643 is about 1465.1426551705. The cubic root of 2146643 is about 128.9990785744. Note that the first 3 decimals are identical.

It can be divided in two parts, 21 and 46643, that added together give a palindrome (46664).

The spelling of 2146643 in words is "two million, one hundred forty-six thousand, six hundred forty-three".