647501 has 8 divisors (see below), whose sum is σ = 695520. Its totient is φ = 600912.

The previous prime is 647489. The next prime is 647503. The reversal of 647501 is 105746.

647501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647501 is a prime.

It is a Duffinian number.

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 647501.

It is not an unprimeable number, because it can be changed into a prime (647503) 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, 686 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (86940).

2⁶⁴⁷⁵⁰¹ is an apocalyptic number.

It is an amenable number.

647501 is a deficient number, since it is larger than the sum of its proper divisors (48019).

647501 is a wasteful number, since it uses less digits than its factorization.

647501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 647501 is about 804.6744683411. The cubic root of 647501 is about 86.5127560904.

The spelling of 647501 in words is "six hundred forty-seven thousand, five hundred one".