1312909 has 8 divisors (see below), whose sum is σ = 1475712. Its totient is φ = 1158960.

The previous prime is 1312907. The next prime is 1312921. The reversal of 1312909 is 9092131.

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 1312909 - 2¹ = 1312907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897 + ... + 2494.

It is an arithmetic number, because the mean of its divisors is an integer number (184464).

2^1312909 is an apocalyptic number.

It is an amenable number.

1312909 is a deficient number, since it is larger than the sum of its proper divisors (162803).

1312909 is a wasteful number, since it uses less digits than its factorization.

1312909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1312909 is about 1145.8224120692. The cubic root of 1312909 is about 109.4993501626.

The spelling of 1312909 in words is "one million, three hundred twelve thousand, nine hundred nine".