428143 has 2 divisors, whose sum is σ = 428144. Its totient is φ = 428142.

The previous prime is 428137. The next prime is 428147. The reversal of 428143 is 341824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214071 + 214072.

It is an arithmetic number, because the mean of its divisors is an integer number (214072).

2⁴²⁸¹⁴³ is an apocalyptic number.

428143 is a deficient number, since it is larger than the sum of its proper divisors (1).

428143 is an equidigital number, since it uses as much as digits as its factorization.

428143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

The square root of 428143 is about 654.3263711635. The cubic root of 428143 is about 75.3696125325.

Adding to 428143 its reverse (341824), we get a palindrome (769967).

The spelling of 428143 in words is "four hundred twenty-eight thousand, one hundred forty-three".