1145831271 has 32 divisors (see below), whose sum is σ = 1761312000. Its totient is φ = 656667648.

The previous prime is 1145831261. The next prime is 1145831303. The reversal of 1145831271 is 1721385411.

It is not a de Polignac number, because 1145831271 - 2²² = 1141636967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145831201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30615 + ... + 56823.

It is an arithmetic number, because the mean of its divisors is an integer number (55041000).

Almost surely, 2^1145831271 is an apocalyptic number.

1145831271 is a deficient number, since it is larger than the sum of its proper divisors (615480729).

1145831271 is a wasteful number, since it uses less digits than its factorization.

1145831271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26303.

The product of its digits is 6720, while the sum is 33.

The square root of 1145831271 is about 33850.1295566206. The cubic root of 1145831271 is about 1046.4220685667.

It can be divided in two parts, 114 and 5831271, that added together give a palindrome (5831385).

The spelling of 1145831271 in words is "one billion, one hundred forty-five million, eight hundred thirty-one thousand, two hundred seventy-one".