1312071 has 4 divisors (see below), whose sum is σ = 1749432. Its totient is φ = 874712.

The previous prime is 1312027. The next prime is 1312079. The reversal of 1312071 is 1702131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1702131 = 3 ⋅567377.

It is a cyclic number.

It is not a de Polignac number, because 1312071 - 2⁹ = 1311559 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312079) 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, 218676 + ... + 218681.

It is an arithmetic number, because the mean of its divisors is an integer number (437358).

2^1312071 is an apocalyptic number.

1312071 is a deficient number, since it is larger than the sum of its proper divisors (437361).

1312071 is an equidigital number, since it uses as much as digits as its factorization.

1312071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437360.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 1312071 is about 1145.4566774872. The cubic root of 1312071 is about 109.4760482213.

The spelling of 1312071 in words is "one million, three hundred twelve thousand, seventy-one".