16425425 has 6 divisors (see below), whose sum is σ = 20367558. Its totient is φ = 13140320.

The previous prime is 16425413. The next prime is 16425433. The reversal of 16425425 is 52452461.

It can be written as a sum of positive squares in 3 ways, for example, as 2076481 + 14348944 = 1441^2 + 3788^2 .

It is not a de Polignac number, because 16425425 - 2⁸ = 16425169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 328484 + ... + 328533.

It is an arithmetic number, because the mean of its divisors is an integer number (3394593).

Almost surely, 2^16425425 is an apocalyptic number.

It is an amenable number.

16425425 is a deficient number, since it is larger than the sum of its proper divisors (3942133).

16425425 is an equidigital number, since it uses as much as digits as its factorization.

16425425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657027 (or 657022 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 16425425 is about 4052.8292586784. The cubic root of 16425425 is about 254.1980444405.

Adding to 16425425 its reverse (52452461), we get a palindrome (68877886).

The spelling of 16425425 in words is "sixteen million, four hundred twenty-five thousand, four hundred twenty-five".