428571 has 40 divisors (see below), whose sum is σ = 772464. Its totient is φ = 233280.

The previous prime is 428569. The next prime is 428579. The reversal of 428571 is 175824.

It is not a de Polignac number, because 428571 - 2¹ = 428569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (2240) is a multiple of the sum of its prime divisors (64).

428571 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (428579) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11565 + ... + 11601.

2⁴²⁸⁵⁷¹ is an apocalyptic number.

428571 is a deficient number, since it is larger than the sum of its proper divisors (343893).

428571 is a wasteful number, since it uses less digits than its factorization.

428571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 64 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 428571 is about 654.6533433811. The cubic root of 428571 is about 75.3947189813.

It can be divided in two parts, 4285 and 71, that added together give a square (4356 = 66²).

The spelling of 428571 in words is "four hundred twenty-eight thousand, five hundred seventy-one".