647572 has 12 divisors (see below), whose sum is σ = 1145620. Its totient is φ = 320256.

The previous prime is 647557. The next prime is 647579. The reversal of 647572 is 275746.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 329476 = 564^2 + 574^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647579) by changing a digit.

647572 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447 + ... + 1222.

2⁶⁴⁷⁵⁷² is an apocalyptic number.

It is an amenable number.

647572 is a deficient number, since it is larger than the sum of its proper divisors (498048).

647572 is a wasteful number, since it uses less digits than its factorization.

647572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770 (or 1768 counting only the distinct ones).

The product of its digits is 11760, while the sum is 31.

The square root of 647572 is about 804.7185843511. The cubic root of 647572 is about 86.5159180836.

The spelling of 647572 in words is "six hundred forty-seven thousand, five hundred seventy-two".