647143 has 12 divisors (see below), whose sum is σ = 771552. Its totient is φ = 540960.

The previous prime is 647131. The next prime is 647147. The reversal of 647143 is 341746.

It is not a de Polignac number, because 647143 - 2⁵ = 647111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2163 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (64296).

2⁶⁴⁷¹⁴³ is an apocalyptic number.

647143 is a deficient number, since it is larger than the sum of its proper divisors (124409).

647143 is a wasteful number, since it uses less digits than its factorization.

647143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 335 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 647143 is about 804.4519873802. The cubic root of 647143 is about 86.4968089972.

Adding to 647143 its reverse (341746), we get a palindrome (988889).

The spelling of 647143 in words is "six hundred forty-seven thousand, one hundred forty-three".