1318841 has 2 divisors, whose sum is σ = 1318842. Its totient is φ = 1318840.

The previous prime is 1318831. The next prime is 1318859. The reversal of 1318841 is 1488131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 163216 = 1075^2 + 404^2 .

It is an emirp because it is prime and its reverse (1488131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318841 - 2¹⁰ = 1317817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1318841.

It is not a weakly prime, because it can be changed into another prime (1318831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659420 + 659421.

It is an arithmetic number, because the mean of its divisors is an integer number (659421).

2^1318841 is an apocalyptic number.

It is an amenable number.

1318841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318841 is an equidigital number, since it uses as much as digits as its factorization.

1318841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 26.

The square root of 1318841 is about 1148.4080285334. The cubic root of 1318841 is about 109.6640161385.

The spelling of 1318841 in words is "one million, three hundred eighteen thousand, eight hundred forty-one".