2143403 has 4 divisors (see below), whose sum is σ = 2149200. Its totient is φ = 2137608.

The previous prime is 2143391. The next prime is 2143417. The reversal of 2143403 is 3043412.

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 2143403 - 2⁸ = 2143147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143483) 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, 2303 + ... + 3096.

It is an arithmetic number, because the mean of its divisors is an integer number (537300).

2^2143403 is an apocalyptic number.

2143403 is a deficient number, since it is larger than the sum of its proper divisors (5797).

2143403 is an equidigital number, since it uses as much as digits as its factorization.

2143403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 2143403 is about 1464.0365432598. The cubic root of 2143403 is about 128.9341450216.

Adding to 2143403 its reverse (3043412), we get a palindrome (5186815).

Subtracting 2143403 from its reverse (3043412), we obtain a palindrome (900009).

The spelling of 2143403 in words is "two million, one hundred forty-three thousand, four hundred three".