647265 has 8 divisors (see below), whose sum is σ = 1035648. Its totient is φ = 345200.

The previous prime is 647263. The next prime is 647293. The reversal of 647265 is 562746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 647265 - 2¹ = 647263 is a prime.

It is a nialpdrome in base 15.

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 647265.

It is not an unprimeable number, because it can be changed into a prime (647261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21561 + ... + 21590.

It is an arithmetic number, because the mean of its divisors is an integer number (129456).

2⁶⁴⁷²⁶⁵ is an apocalyptic number.

It is an amenable number.

647265 is a deficient number, since it is larger than the sum of its proper divisors (388383).

647265 is a wasteful number, since it uses less digits than its factorization.

647265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43159.

The product of its digits is 10080, while the sum is 30.

The square root of 647265 is about 804.5278118250. The cubic root of 647265 is about 86.5022441419.

The spelling of 647265 in words is "six hundred forty-seven thousand, two hundred sixty-five".