671296 has 28 divisors (see below), whose sum is σ = 1412748. Its totient is φ = 315392.

The previous prime is 671287. The next prime is 671299. The reversal of 671296 is 692176.

It can be written as a sum of positive squares in 2 ways, for example, as 230400 + 440896 = 480^2 + 664^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671299) by changing a digit.

671296 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, 780 + ... + 1396.

2⁶⁷¹²⁹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (706374).

671296 is an abundant number, since it is smaller than the sum of its proper divisors (741452).

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

671296 is a wasteful number, since it uses less digits than its factorization.

671296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 636 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 671296 is about 819.3265527249. The cubic root of 671296 is about 87.5597849925.

The spelling of 671296 in words is "six hundred seventy-one thousand, two hundred ninety-six".