1318487 has 2 divisors, whose sum is σ = 1318488. Its totient is φ = 1318486.

The previous prime is 1318477. The next prime is 1318489. The reversal of 1318487 is 7848131.

It is a strong prime.

It is an emirp because it is prime and its reverse (7848131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318487 is a prime.

Together with 1318489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659243 + 659244.

It is an arithmetic number, because the mean of its divisors is an integer number (659244).

2^1318487 is an apocalyptic number.

1318487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318487 is an equidigital number, since it uses as much as digits as its factorization.

1318487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 32.

The square root of 1318487 is about 1148.2538917853. The cubic root of 1318487 is about 109.6542033469.

The spelling of 1318487 in words is "one million, three hundred eighteen thousand, four hundred eighty-seven".