1306869 has 4 divisors (see below), whose sum is σ = 1742496. Its totient is φ = 871244.

The previous prime is 1306853. The next prime is 1306873. The reversal of 1306869 is 9686031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1306869 - 2⁴ = 1306853 is a prime.

It is a super-2 number, since 2×1306869² = 3415813166322, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306819) 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 3 ways as a sum of consecutive naturals, for example, 217809 + ... + 217814.

It is an arithmetic number, because the mean of its divisors is an integer number (435624).

2^1306869 is an apocalyptic number.

It is an amenable number.

1306869 is a deficient number, since it is larger than the sum of its proper divisors (435627).

1306869 is an equidigital number, since it uses as much as digits as its factorization.

1306869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435626.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1306869 is about 1143.1837122703. The cubic root of 1306869 is about 109.3311758035.

The spelling of 1306869 in words is "one million, three hundred six thousand, eight hundred sixty-nine".