1312667 has 2 divisors, whose sum is σ = 1312668. Its totient is φ = 1312666.

The previous prime is 1312657. The next prime is 1312669. The reversal of 1312667 is 7662131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312667 - 2⁶ = 1312603 is a prime.

Together with 1312669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1312669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656333 + 656334.

It is an arithmetic number, because the mean of its divisors is an integer number (656334).

2^1312667 is an apocalyptic number.

1312667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312667 is an equidigital number, since it uses as much as digits as its factorization.

1312667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 1312667 is about 1145.7168061960. The cubic root of 1312667 is about 109.4926219809.

Adding to 1312667 its reverse (7662131), we get a palindrome (8974798).

The spelling of 1312667 in words is "one million, three hundred twelve thousand, six hundred sixty-seven".