1271849 has 2 divisors, whose sum is σ = 1271850. Its totient is φ = 1271848.

The previous prime is 1271843. The next prime is 1271903. The reversal of 1271849 is 9481721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868624 + 403225 = 932^2 + 635^2 .

It is an emirp because it is prime and its reverse (9481721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1271849 - 2⁴ = 1271833 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1271843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635924 + 635925.

It is an arithmetic number, because the mean of its divisors is an integer number (635925).

2^1271849 is an apocalyptic number.

It is an amenable number.

1271849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271849 is an equidigital number, since it uses as much as digits as its factorization.

1271849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 1271849 is about 1127.7628296765. The cubic root of 1271849 is about 108.3457426942.

The spelling of 1271849 in words is "one million, two hundred seventy-one thousand, eight hundred forty-nine".