1242271 has 2 divisors, whose sum is σ = 1242272. Its totient is φ = 1242270.

The previous prime is 1242251. The next prime is 1242289. The reversal of 1242271 is 1722421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621135 + 621136.

It is an arithmetic number, because the mean of its divisors is an integer number (621136).

2^1242271 is an apocalyptic number.

1242271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242271 is an equidigital number, since it uses as much as digits as its factorization.

1242271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 19.

The square root of 1242271 is about 1114.5721152083. The cubic root of 1242271 is about 107.4992536454.

Adding to 1242271 its reverse (1722421), we get a palindrome (2964692).

The spelling of 1242271 in words is "one million, two hundred forty-two thousand, two hundred seventy-one".