647506 has 8 divisors (see below), whose sum is σ = 975744. Its totient is φ = 322260.

The previous prime is 647503. The next prime is 647509. The reversal of 647506 is 605746.

It is an interprime number because it is at equal distance from previous prime (647503) and next prime (647509).

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

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 3 ways as a sum of consecutive naturals, for example, 90 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (121968).

2⁶⁴⁷⁵⁰⁶ is an apocalyptic number.

647506 is a deficient number, since it is larger than the sum of its proper divisors (328238).

647506 is a wasteful number, since it uses less digits than its factorization.

647506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 647506 is about 804.6775751815. The cubic root of 647506 is about 86.5129787736.

The spelling of 647506 in words is "six hundred forty-seven thousand, five hundred six".