1331243 has 2 divisors, whose sum is σ = 1331244. Its totient is φ = 1331242.

The previous prime is 1331227. The next prime is 1331249. The reversal of 1331243 is 3421331.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3421331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331243 - 2⁴ = 1331227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1331249) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665621 + 665622.

It is an arithmetic number, because the mean of its divisors is an integer number (665622).

2^1331243 is an apocalyptic number.

1331243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331243 is an equidigital number, since it uses as much as digits as its factorization.

1331243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 17.

The square root of 1331243 is about 1153.7950424577. The cubic root of 1331243 is about 110.0066938075.

Adding to 1331243 its reverse (3421331), we get a palindrome (4752574).

The spelling of 1331243 in words is "one million, three hundred thirty-one thousand, two hundred forty-three".