1271285 has 4 divisors (see below), whose sum is σ = 1525548. Its totient is φ = 1017024.

The previous prime is 1271251. The next prime is 1271293. The reversal of 1271285 is 5821721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 421201 + 850084 = 649^2 + 922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271285 - 2⁸ = 1271029 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 127124 + ... + 127133.

It is an arithmetic number, because the mean of its divisors is an integer number (381387).

2^1271285 is an apocalyptic number.

It is an amenable number.

1271285 is a deficient number, since it is larger than the sum of its proper divisors (254263).

1271285 is an equidigital number, since it uses as much as digits as its factorization.

1271285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254262.

The product of its digits is 1120, while the sum is 26.

The square root of 1271285 is about 1127.5127493736. The cubic root of 1271285 is about 108.3297250606.

The spelling of 1271285 in words is "one million, two hundred seventy-one thousand, two hundred eighty-five".