64825 has 6 divisors (see below), whose sum is σ = 80414. Its totient is φ = 51840.

The previous prime is 64817. The next prime is 64849. The reversal of 64825 is 52846.

It can be written as a sum of positive squares in 3 ways, for example, as 5776 + 59049 = 76^2 + 243^2 .

It is not a de Polignac number, because 64825 - 2³ = 64817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2593 = 64825 / (6 + 4 + 8 + 2 + 5).

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 64825.

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 5 ways as a sum of consecutive naturals, for example, 1272 + ... + 1321.

2⁶⁴⁸²⁵ is an apocalyptic number.

It is an amenable number.

64825 is a deficient number, since it is larger than the sum of its proper divisors (15589).

64825 is a wasteful number, since it uses less digits than its factorization.

64825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603 (or 2598 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 64825 is about 254.6075411295. The cubic root of 64825 is about 40.1711417185.

The spelling of 64825 in words is "sixty-four thousand, eight hundred twenty-five".