648925 has 12 divisors (see below), whose sum is σ = 815796. Its totient is φ = 512000.

The previous prime is 648917. The next prime is 648931. The reversal of 648925 is 529846.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 139129 + 509796 = 373^2 + 714^2 .

It is not a de Polignac number, because 648925 - 2³ = 648917 is a prime.

It is a super-2 number, since 2×648925² = 842207311250, which contains 22 as substring.

It is a Duffinian number.

648925 is a lucky number.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 2397 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (67983).

2⁶⁴⁸⁹²⁵ is an apocalyptic number.

It is an amenable number.

648925 is a deficient number, since it is larger than the sum of its proper divisors (166871).

648925 is a wasteful number, since it uses less digits than its factorization.

648925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 363 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 648925 is about 805.5588122540. The cubic root of 648925 is about 86.5761299767.

The spelling of 648925 in words is "six hundred forty-eight thousand, nine hundred twenty-five".