64425 has 12 divisors (see below), whose sum is σ = 106640. Its totient is φ = 34320.

The previous prime is 64403. The next prime is 64433. The reversal of 64425 is 52446.

It is a happy number.

It is not a de Polignac number, because 64425 - 2⁹ = 63913 is a prime.

It is a plaindrome in base 11.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355 + ... + 504.

2⁶⁴⁴²⁵ is an apocalyptic number.

It is an amenable number.

64425 is a deficient number, since it is larger than the sum of its proper divisors (42215).

64425 is a wasteful number, since it uses less digits than its factorization.

64425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 867 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 64425 is about 253.8208029299. The cubic root of 64425 is about 40.0883463959.

Adding to 64425 its sum of digits (21), we get a palindrome (64446).

The spelling of 64425 in words is "sixty-four thousand, four hundred twenty-five".