648425 has 12 divisors (see below), whose sum is σ = 826956. Its totient is φ = 504000.

The previous prime is 648391. The next prime is 648433. The reversal of 648425 is 524846.

648425 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 6 ways, for example, as 52441 + 595984 = 229^2 + 772^2 .

It is not a de Polignac number, because 648425 - 2¹⁰ = 647401 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648425.

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, 575 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (68913).

2⁶⁴⁸⁴²⁵ is an apocalyptic number.

It is an amenable number.

648425 is a deficient number, since it is larger than the sum of its proper divisors (178531).

648425 is a wasteful number, since it uses less digits than its factorization.

648425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 743 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 648425 is about 805.2484088777. The cubic root of 648425 is about 86.5538884811.

The spelling of 648425 in words is "six hundred forty-eight thousand, four hundred twenty-five".