428147 has 2 divisors, whose sum is σ = 428148. Its totient is φ = 428146.

The previous prime is 428143. The next prime is 428149. The reversal of 428147 is 741824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428147 - 2² = 428143 is a prime.

Together with 428149, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428147.

It is not a weakly prime, because it can be changed into another prime (428143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214073 + 214074.

It is an arithmetic number, because the mean of its divisors is an integer number (214074).

2⁴²⁸¹⁴⁷ is an apocalyptic number.

428147 is a deficient number, since it is larger than the sum of its proper divisors (1).

428147 is an equidigital number, since it uses as much as digits as its factorization.

428147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 26.

The square root of 428147 is about 654.3294277350. The cubic root of 428147 is about 75.3698472496.

It can be divided in two parts, 428 and 147, that added together give a palindrome (575).

The spelling of 428147 in words is "four hundred twenty-eight thousand, one hundred forty-seven".