428671 has 2 divisors, whose sum is σ = 428672. Its totient is φ = 428670.

The previous prime is 428663. The next prime is 428677. The reversal of 428671 is 176824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428671 - 2³ = 428663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214335 + 214336.

It is an arithmetic number, because the mean of its divisors is an integer number (214336).

2⁴²⁸⁶⁷¹ is an apocalyptic number.

428671 is a deficient number, since it is larger than the sum of its proper divisors (1).

428671 is an equidigital number, since it uses as much as digits as its factorization.

428671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 428671 is about 654.7297152261. The cubic root of 428671 is about 75.4005825649.

The spelling of 428671 in words is "four hundred twenty-eight thousand, six hundred seventy-one".