1145171 has 16 divisors (see below), whose sum is σ = 1306368. Its totient is φ = 998400.

The previous prime is 1145143. The next prime is 1145173. The reversal of 1145171 is 1715411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1145171 - 2⁶ = 1145107 is a prime.

It is a super-2 number, since 2×1145171² = 2622833238482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145173) 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 15 ways as a sum of consecutive naturals, for example, 21581 + ... + 21633.

It is an arithmetic number, because the mean of its divisors is an integer number (81648).

2^1145171 is an apocalyptic number.

1145171 is a deficient number, since it is larger than the sum of its proper divisors (161197).

1145171 is a wasteful number, since it uses less digits than its factorization.

1145171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142.

The product of its digits is 140, while the sum is 20.

The square root of 1145171 is about 1070.1266280212. The cubic root of 1145171 is about 104.6221034052.

The spelling of 1145171 in words is "one million, one hundred forty-five thousand, one hundred seventy-one".