647425 has 24 divisors (see below), whose sum is σ = 892800. Its totient is φ = 463680.

The previous prime is 647417. The next prime is 647429. The reversal of 647425 is 524746.

It is not a de Polignac number, because 647425 - 2³ = 647417 is a prime.

Its product of digits (6720) is a multiple of the sum of its prime factors (105).

It is a junction number, because it is equal to n+sod(n) for n = 647393 and 647402.

It is not an unprimeable number, because it can be changed into a prime (647429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13752 + ... + 13798.

It is an arithmetic number, because the mean of its divisors is an integer number (37200).

2⁶⁴⁷⁴²⁵ is an apocalyptic number.

It is an amenable number.

647425 is a deficient number, since it is larger than the sum of its proper divisors (245375).

647425 is a wasteful number, since it uses less digits than its factorization.

647425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 100 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 647425 is about 804.6272428895. The cubic root of 647425 is about 86.5093711655.

The spelling of 647425 in words is "six hundred forty-seven thousand, four hundred twenty-five".