647152 has 20 divisors (see below), whose sum is σ = 1368216. Its totient is φ = 294080.

The previous prime is 647147. The next prime is 647161. The reversal of 647152 is 251746.

It is a super-2 number, since 2×647152² = 837611422208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

647152 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663 + ... + 2014.

2⁶⁴⁷¹⁵² is an apocalyptic number.

It is an amenable number.

647152 is an abundant number, since it is smaller than the sum of its proper divisors (721064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647152 is a wasteful number, since it uses less digits than its factorization.

647152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696 (or 3690 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 647152 is about 804.4575812310. The cubic root of 647152 is about 86.4972099738.

Adding to 647152 its reverse (251746), we get a palindrome (898898).

The spelling of 647152 in words is "six hundred forty-seven thousand, one hundred fifty-two".