1312973 has 4 divisors (see below), whose sum is σ = 1315548. Its totient is φ = 1310400.

The previous prime is 1312967. The next prime is 1313041. The reversal of 1312973 is 3792131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 515524 + 797449 = 718^2 + 893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312973 is a prime.

It is a Duffinian 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 (1312963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236 + ... + 1637.

It is an arithmetic number, because the mean of its divisors is an integer number (328887).

2^1312973 is an apocalyptic number.

It is an amenable number.

1312973 is a deficient number, since it is larger than the sum of its proper divisors (2575).

1312973 is an equidigital number, since it uses as much as digits as its factorization.

1312973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574.

The product of its digits is 1134, while the sum is 26.

The square root of 1312973 is about 1145.8503392677. The cubic root of 1312973 is about 109.5011293782.

The spelling of 1312973 in words is "one million, three hundred twelve thousand, nine hundred seventy-three".