1314821 has 2 divisors, whose sum is σ = 1314822. Its totient is φ = 1314820.

The previous prime is 1314809. The next prime is 1314823. The reversal of 1314821 is 1284131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 264196 = 1025^2 + 514^2 .

It is an emirp because it is prime and its reverse (1284131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1314821 - 2¹⁰ = 1313797 is a prime.

It is a Sophie Germain prime.

Together with 1314823, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1314793 and 1314802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1314823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657410 + 657411.

It is an arithmetic number, because the mean of its divisors is an integer number (657411).

2^1314821 is an apocalyptic number.

It is an amenable number.

1314821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1314821 is an equidigital number, since it uses as much as digits as its factorization.

1314821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 20.

The square root of 1314821 is about 1146.6564437529. The cubic root of 1314821 is about 109.5524793100.

Adding to 1314821 its reverse (1284131), we get a palindrome (2598952).

The spelling of 1314821 in words is "one million, three hundred fourteen thousand, eight hundred twenty-one".