1171145 has 8 divisors (see below), whose sum is σ = 1425600. Its totient is φ = 923440.

The previous prime is 1171133. The next prime is 1171189. The reversal of 1171145 is 5411711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1171145 - 2¹⁶ = 1105609 is a prime.

It is a super-2 number, since 2×1171145² = 2743161222050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295 + ... + 2004.

It is an arithmetic number, because the mean of its divisors is an integer number (178200).

2^1171145 is an apocalyptic number.

It is an amenable number.

1171145 is a deficient number, since it is larger than the sum of its proper divisors (254455).

1171145 is an equidigital number, since it uses as much as digits as its factorization.

1171145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375.

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

The square root of 1171145 is about 1082.1945296480. The cubic root of 1171145 is about 105.4071868520.

Adding to 1171145 its reverse (5411711), we get a palindrome (6582856).

The spelling of 1171145 in words is "one million, one hundred seventy-one thousand, one hundred forty-five".