1428443 has 4 divisors (see below), whose sum is σ = 1442688. Its totient is φ = 1414200.

The previous prime is 1428431. The next prime is 1428473. The reversal of 1428443 is 3448241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3448241 = 101 ⋅34141.

It is a cyclic number.

It is not a de Polignac number, because 1428443 - 2¹² = 1424347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428473) 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, 6971 + ... + 7172.

It is an arithmetic number, because the mean of its divisors is an integer number (360672).

2^1428443 is an apocalyptic number.

1428443 is a deficient number, since it is larger than the sum of its proper divisors (14245).

1428443 is a wasteful number, since it uses less digits than its factorization.

1428443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14244.

The product of its digits is 3072, while the sum is 26.

The square root of 1428443 is about 1195.1748826009. The cubic root of 1428443 is about 112.6214129537.

The spelling of 1428443 in words is "one million, four hundred twenty-eight thousand, four hundred forty-three".