1271939 has 2 divisors, whose sum is σ = 1271940. Its totient is φ = 1271938.

The previous prime is 1271929. The next prime is 1271953. The reversal of 1271939 is 9391721.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1271939 is a prime.

It is a super-3 number, since 3×1271939³ = 6173338713381327057, which contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1271929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635969 + 635970.

It is an arithmetic number, because the mean of its divisors is an integer number (635970).

2^1271939 is an apocalyptic number.

1271939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271939 is an equidigital number, since it uses as much as digits as its factorization.

1271939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 32.

The square root of 1271939 is about 1127.8027309774. The cubic root of 1271939 is about 108.3482982614.

The spelling of 1271939 in words is "one million, two hundred seventy-one thousand, nine hundred thirty-nine".