647151 has 16 divisors (see below), whose sum is σ = 919296. Its totient is φ = 404096.

The previous prime is 647147. The next prime is 647161. The reversal of 647151 is 151746.

It is a cyclic number.

It is not a de Polignac number, because 647151 - 2² = 647147 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

647151 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5671 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2⁶⁴⁷¹⁵¹ is an apocalyptic number.

647151 is a deficient number, since it is larger than the sum of its proper divisors (272145).

647151 is a wasteful number, since it uses less digits than its factorization.

647151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its digits is 840, while the sum is 24.

The square root of 647151 is about 804.4569596939. The cubic root of 647151 is about 86.4971654211.

Adding to 647151 its reverse (151746), we get a palindrome (798897).

The spelling of 647151 in words is "six hundred forty-seven thousand, one hundred fifty-one".