647525 has 12 divisors (see below), whose sum is σ = 818400. Its totient is φ = 508080.

The previous prime is 647509. The next prime is 647527. The reversal of 647525 is 525746.

647525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 647525 - 2⁴ = 647509 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647525.

It is not an unprimeable number, because it can be changed into a prime (647527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1256 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (68200).

2⁶⁴⁷⁵²⁵ is an apocalyptic number.

It is an amenable number.

647525 is a deficient number, since it is larger than the sum of its proper divisors (170875).

647525 is a wasteful number, since it uses less digits than its factorization.

647525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 503 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 647525 is about 804.6893810658. The cubic root of 647525 is about 86.5138249590.

The spelling of 647525 in words is "six hundred forty-seven thousand, five hundred twenty-five".