1306687 has 8 divisors (see below), whose sum is σ = 1391600. Its totient is φ = 1223424.

The previous prime is 1306667. The next prime is 1306691. The reversal of 1306687 is 7866031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1306687 - 2¹⁵ = 1273919 is a prime.

It is a super-3 number, since 3×1306687³ = 6693233343884354109, which contains 333 as substring.

It is a Duffinian number.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489 + ... + 2197.

It is an arithmetic number, because the mean of its divisors is an integer number (173950).

2^1306687 is an apocalyptic number.

1306687 is a deficient number, since it is larger than the sum of its proper divisors (84913).

1306687 is an equidigital number, since it uses as much as digits as its factorization.

1306687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1306687 is about 1143.1041072448. The cubic root of 1306687 is about 109.3261002635.

The spelling of 1306687 in words is "one million, three hundred six thousand, six hundred eighty-seven".