1288271 has 8 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 1246752.

The previous prime is 1288249. The next prime is 1288291. The reversal of 1288271 is 1728821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1288271 - 2¹⁸ = 1026127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288201) by changing a digit.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5666 + ... + 5888.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

2^1288271 is an apocalyptic number.

1288271 is a deficient number, since it is larger than the sum of its proper divisors (42289).

1288271 is a wasteful number, since it uses less digits than its factorization.

1288271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385.

The product of its digits is 1792, while the sum is 29.

The square root of 1288271 is about 1135.0202641363. The cubic root of 1288271 is about 108.8100667859.

The spelling of 1288271 in words is "one million, two hundred eighty-eight thousand, two hundred seventy-one".