1312081 has 4 divisors (see below), whose sum is σ = 1369152. Its totient is φ = 1255012.

The previous prime is 1312079. The next prime is 1312093. The reversal of 1312081 is 1802131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1802131 = 19 ⋅94849.

It is a cyclic number.

It is not a de Polignac number, because 1312081 - 2¹ = 1312079 is a prime.

It is a super-2 number, since 2×1312081² = 3443113101122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312001) 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 3 ways as a sum of consecutive naturals, for example, 28501 + ... + 28546.

It is an arithmetic number, because the mean of its divisors is an integer number (342288).

2^1312081 is an apocalyptic number.

It is an amenable number.

1312081 is a deficient number, since it is larger than the sum of its proper divisors (57071).

1312081 is an equidigital number, since it uses as much as digits as its factorization.

1312081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57070.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1312081 is about 1145.4610425501. The cubic root of 1312081 is about 109.4763263459.

The spelling of 1312081 in words is "one million, three hundred twelve thousand, eighty-one".