1306647 has 12 divisors (see below), whose sum is σ = 1928160. Its totient is φ = 852288.

The previous prime is 1306633. The next prime is 1306661. The reversal of 1306647 is 7466031.

1306647 is a `hidden beast` number, since 13 + 0 + 6 + 647 = 666.

It is an interprime number because it is at equal distance from previous prime (1306633) and next prime (1306661).

It is not a de Polignac number, because 1306647 - 2⁷ = 1306519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1306647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1122 + ... + 1967.

It is an arithmetic number, because the mean of its divisors is an integer number (160680).

2^1306647 is an apocalyptic number.

1306647 is a deficient number, since it is larger than the sum of its proper divisors (621513).

1306647 is a wasteful number, since it uses less digits than its factorization.

1306647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1306647 is about 1143.0866108918. The cubic root of 1306647 is about 109.3249846970.

It can be divided in two parts, 1306 and 647, that added together give a triangular number (1953 = T₆₂).

The spelling of 1306647 in words is "one million, three hundred six thousand, six hundred forty-seven".