3128243 has 4 divisors (see below), whose sum is σ = 3132600. Its totient is φ = 3123888.

The previous prime is 3128233. The next prime is 3128249. The reversal of 3128243 is 3428213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3428213 = 1499 ⋅2287.

It is a cyclic number.

It is not a de Polignac number, because 3128243 - 2⁴ = 3128227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128249) 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, 818 + ... + 2631.

It is an arithmetic number, because the mean of its divisors is an integer number (783150).

Almost surely, 2^3128243 is an apocalyptic number.

3128243 is a deficient number, since it is larger than the sum of its proper divisors (4357).

3128243 is an equidigital number, since it uses as much as digits as its factorization.

3128243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356.

The product of its digits is 1152, while the sum is 23.

The square root of 3128243 is about 1768.6839740327. The cubic root of 3128243 is about 146.2514432370.

The spelling of 3128243 in words is "three million, one hundred twenty-eight thousand, two hundred forty-three".