1145771 has 4 divisors (see below), whose sum is σ = 1249944. Its totient is φ = 1041600.

The previous prime is 1145747. The next prime is 1145773. The reversal of 1145771 is 1775411.

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

It is a cyclic number.

It is not a de Polignac number, because 1145771 - 2¹⁸ = 883627 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145771.

It is not an unprimeable number, because it can be changed into a prime (1145773) by changing a digit.

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, 52070 + ... + 52091.

It is an arithmetic number, because the mean of its divisors is an integer number (312486).

2^1145771 is an apocalyptic number.

1145771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1145771 is a deficient number, since it is larger than the sum of its proper divisors (104173).

1145771 is a wasteful number, since it uses less digits than its factorization.

1145771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104172.

The product of its digits is 980, while the sum is 26.

The square root of 1145771 is about 1070.4069319656. The cubic root of 1145771 is about 104.6403720894.

It can be divided in two parts, 114 and 5771, that added together give a palindrome (5885).

The spelling of 1145771 in words is "one million, one hundred forty-five thousand, seven hundred seventy-one".