647012 has 6 divisors (see below), whose sum is σ = 1132278. Its totient is φ = 323504.

The previous prime is 647011. The next prime is 647033. The reversal of 647012 is 210746.

It can be written as a sum of positive squares in only one way, i.e., 440896 + 206116 = 664^2 + 454^2 .

It is a nialpdrome in base 7 and base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647012.

It is not an unprimeable number, because it can be changed into a prime (647011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80873 + ... + 80880.

It is an arithmetic number, because the mean of its divisors is an integer number (188713).

2⁶⁴⁷⁰¹² is an apocalyptic number.

It is an amenable number.

647012 is a deficient number, since it is larger than the sum of its proper divisors (485266).

647012 is a wasteful number, since it uses less digits than its factorization.

647012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161757 (or 161755 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 647012 is about 804.3705613708. The cubic root of 647012 is about 86.4909721385.

Adding to 647012 its reverse (210746), we get a palindrome (857758).

The spelling of 647012 in words is "six hundred forty-seven thousand, twelve".