648942225 has 12 divisors (see below), whose sum is σ = 1072917936. Its totient is φ = 346102480.

The previous prime is 648942221. The next prime is 648942227. The reversal of 648942225 is 522249846.

It is not a de Polignac number, because 648942225 - 2² = 648942221 is a prime.

It is a super-2 number, since 2×648942225² = 842252022775901250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648942221) by changing a digit.

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, 4326207 + ... + 4326356.

It is an arithmetic number, because the mean of its divisors is an integer number (89409828).

Almost surely, 2^648942225 is an apocalyptic number.

It is an amenable number.

648942225 is a deficient number, since it is larger than the sum of its proper divisors (423975711).

648942225 is a wasteful number, since it uses less digits than its factorization.

648942225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8652576 (or 8652571 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 648942225 is about 25474.3444469136. The cubic root of 648942225 is about 865.7689599267.

The spelling of 648942225 in words is "six hundred forty-eight million, nine hundred forty-two thousand, two hundred twenty-five".