1151271 has 24 divisors (see below), whose sum is σ = 1881360. Its totient is φ = 672000.

The previous prime is 1151251. The next prime is 1151287. The reversal of 1151271 is 1721511.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1151271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2671 + ... + 3071.

It is an arithmetic number, because the mean of its divisors is an integer number (78390).

2^1151271 is an apocalyptic number.

1151271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1151271 is a deficient number, since it is larger than the sum of its proper divisors (730089).

1151271 is a wasteful number, since it uses less digits than its factorization.

1151271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 444 counting only the distinct ones).

The product of its digits is 70, while the sum is 18.

The square root of 1151271 is about 1072.9729726326. The cubic root of 1151271 is about 104.8075385968.

Adding to 1151271 its reverse (1721511), we get a palindrome (2872782).

The spelling of 1151271 in words is "one million, one hundred fifty-one thousand, two hundred seventy-one".