1243271 has 2 divisors, whose sum is σ = 1243272. Its totient is φ = 1243270.

The previous prime is 1243211. The next prime is 1243273. The reversal of 1243271 is 1723421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243271 is a prime.

Together with 1243273, 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 (1243273) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621635 + 621636.

It is an arithmetic number, because the mean of its divisors is an integer number (621636).

2^1243271 is an apocalyptic number.

1243271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243271 is an equidigital number, since it uses as much as digits as its factorization.

1243271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 1243271 is about 1115.0206276119. The cubic root of 1243271 is about 107.5280907300.

Adding to 1243271 its reverse (1723421), we get a palindrome (2966692).

The spelling of 1243271 in words is "one million, two hundred forty-three thousand, two hundred seventy-one".