1145771271 has 16 divisors (see below), whose sum is σ = 1698278400. Its totient is φ = 763469784.

The previous prime is 1145771227. The next prime is 1145771273. The reversal of 1145771271 is 1721775411.

1145771271 is a `hidden beast` number, since 1 + 1 + 4 + 577 + 12 + 71 = 666.

It is not a de Polignac number, because 1145771271 - 2²⁵ = 1112216839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145771273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51850 + ... + 70568.

It is an arithmetic number, because the mean of its divisors is an integer number (106142400).

Almost surely, 2^1145771271 is an apocalyptic number.

1145771271 is a deficient number, since it is larger than the sum of its proper divisors (552507129).

1145771271 is a wasteful number, since it uses less digits than its factorization.

1145771271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20995 (or 20989 counting only the distinct ones).

The product of its digits is 13720, while the sum is 36.

The square root of 1145771271 is about 33849.2432854857. The cubic root of 1145771271 is about 1046.4038033934.

It can be divided in two parts, 11457 and 71271, that added together give a palindrome (82728).

The spelling of 1145771271 in words is "one billion, one hundred forty-five million, seven hundred seventy-one thousand, two hundred seventy-one".