428280161 has 2 divisors, whose sum is σ = 428280162. Its totient is φ = 428280160.

The previous prime is 428280119. The next prime is 428280163. The reversal of 428280161 is 161082824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373223761 + 55056400 = 19319^2 + 7420^2 .

It is a cyclic number.

It is not a de Polignac number, because 428280161 - 2¹⁴ = 428263777 is a prime.

Together with 428280163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (428280163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214140080 + 214140081.

It is an arithmetic number, because the mean of its divisors is an integer number (214140081).

Almost surely, 2^428280161 is an apocalyptic number.

It is an amenable number.

428280161 is a deficient number, since it is larger than the sum of its proper divisors (1).

428280161 is an equidigital number, since it uses as much as digits as its factorization.

428280161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 428280161 is about 20694.9308044265. The cubic root of 428280161 is about 753.7766020788.

The spelling of 428280161 in words is "four hundred twenty-eight million, two hundred eighty thousand, one hundred sixty-one".