1306664 has 16 divisors (see below), whose sum is σ = 2464020. Its totient is φ = 649600.

The previous prime is 1306663. The next prime is 1306667. The reversal of 1306664 is 4666031.

It can be written as a sum of positive squares in 2 ways, for example, as 1304164 + 2500 = 1142^2 + 50^2 .

It is not an unprimeable number, because it can be changed into a prime (1306661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1514 + ... + 2214.

2^1306664 is an apocalyptic number.

It is an amenable number.

1306664 is a deficient number, since it is larger than the sum of its proper divisors (1157356).

1306664 is a wasteful number, since it uses less digits than its factorization.

1306664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1306664 is about 1143.0940468745. The cubic root of 1306664 is about 109.3254588155.

The spelling of 1306664 in words is "one million, three hundred six thousand, six hundred sixty-four".