428022061 has 2 divisors, whose sum is σ = 428022062. Its totient is φ = 428022060.

The previous prime is 428022059. The next prime is 428022109. The reversal of 428022061 is 160220824.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364580836 + 63441225 = 19094^2 + 7965^2 .

It is a cyclic number.

It is not a de Polignac number, because 428022061 - 2¹ = 428022059 is a prime.

Together with 428022059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428022041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214011030 + 214011031.

It is an arithmetic number, because the mean of its divisors is an integer number (214011031).

Almost surely, 2^428022061 is an apocalyptic number.

It is an amenable number.

428022061 is a deficient number, since it is larger than the sum of its proper divisors (1).

428022061 is an equidigital number, since it uses as much as digits as its factorization.

428022061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 428022061 is about 20688.6940380489. The cubic root of 428022061 is about 753.6251522779.

Adding to 428022061 its reverse (160220824), we get a palindrome (588242885).

The spelling of 428022061 in words is "four hundred twenty-eight million, twenty-two thousand, sixty-one".