428971 has 4 divisors (see below), whose sum is σ = 432000. Its totient is φ = 425944.

The previous prime is 428957. The next prime is 428977. The reversal of 428971 is 179824.

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 428971 - 2⁷ = 428843 is a prime.

It is a super-2 number, since 2×428971² = 368032237682, which contains 22 as substring.

It is a Duffinian number.

428971 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (428977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291 + ... + 1588.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2⁴²⁸⁹⁷¹ is an apocalyptic number.

428971 is a deficient number, since it is larger than the sum of its proper divisors (3029).

428971 is a wasteful number, since it uses less digits than its factorization.

428971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028.

The product of its digits is 4032, while the sum is 31.

The square root of 428971 is about 654.9587773288. The cubic root of 428971 is about 75.4181678459.

The spelling of 428971 in words is "four hundred twenty-eight thousand, nine hundred seventy-one".