425620171 has 2 divisors, whose sum is σ = 425620172. Its totient is φ = 425620170.

The previous prime is 425620123. The next prime is 425620183. The reversal of 425620171 is 171026524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425620171 - 2⁹ = 425619659 is a prime.

It is not a weakly prime, because it can be changed into another prime (425623171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212810085 + 212810086.

It is an arithmetic number, because the mean of its divisors is an integer number (212810086).

Almost surely, 2^425620171 is an apocalyptic number.

425620171 is a deficient number, since it is larger than the sum of its proper divisors (1).

425620171 is an equidigital number, since it uses as much as digits as its factorization.

425620171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 425620171 is about 20630.5640010156. The cubic root of 425620171 is about 752.2128253768.

Adding to 425620171 its reverse (171026524), we get a palindrome (596646695).

The spelling of 425620171 in words is "four hundred twenty-five million, six hundred twenty thousand, one hundred seventy-one".