428161 has 2 divisors, whose sum is σ = 428162. Its totient is φ = 428160.

The previous prime is 428149. The next prime is 428167. The reversal of 428161 is 161824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309136 + 119025 = 556^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 428161 - 2⁷ = 428033 is a prime.

It is not a weakly prime, because it can be changed into another prime (428167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214080 + 214081.

It is an arithmetic number, because the mean of its divisors is an integer number (214081).

2⁴²⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

428161 is a deficient number, since it is larger than the sum of its proper divisors (1).

428161 is an equidigital number, since it uses as much as digits as its factorization.

428161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 22.

The square root of 428161 is about 654.3401256228. The cubic root of 428161 is about 75.3706687481.

Adding to 428161 its reverse (161824), we get a palindrome (589985).

The spelling of 428161 in words is "four hundred twenty-eight thousand, one hundred sixty-one".