1312019 has 2 divisors, whose sum is σ = 1312020. Its totient is φ = 1312018.

The previous prime is 1312001. The next prime is 1312027. The reversal of 1312019 is 9102131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9102131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1312019 - 2¹² = 1307923 is a prime.

It is a super-2 number, since 2×1312019² = 3442787712722, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₀₀₈₈₀ and since 1312019 and 100880 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311988 and 1312006.

It is not a weakly prime, because it can be changed into another prime (1312079) 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 as a sum of consecutive naturals, namely, 656009 + 656010.

It is an arithmetic number, because the mean of its divisors is an integer number (656010).

2^1312019 is an apocalyptic number.

1312019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312019 is an equidigital number, since it uses as much as digits as its factorization.

1312019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1312019 is about 1145.4339788918. The cubic root of 1312019 is about 109.4746019506.

The spelling of 1312019 in words is "one million, three hundred twelve thousand, nineteen".