1306644 has 12 divisors (see below), whose sum is σ = 3048864. Its totient is φ = 435544.

The previous prime is 1306633. The next prime is 1306661. The reversal of 1306644 is 4466031.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54432 + ... + 54455.

It is an arithmetic number, because the mean of its divisors is an integer number (254072).

2^1306644 is an apocalyptic number.

It is an amenable number.

1306644 is an abundant number, since it is smaller than the sum of its proper divisors (1742220).

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

1306644 is a wasteful number, since it uses less digits than its factorization.

1306644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108894 (or 108892 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1306644 is about 1143.0852986545. The cubic root of 1306644 is about 109.3249010286.

The spelling of 1306644 in words is "one million, three hundred six thousand, six hundred forty-four".