1172105 has 16 divisors (see below), whose sum is σ = 1556928. Its totient is φ = 840000.

The previous prime is 1172081. The next prime is 1172107. The reversal of 1172105 is 5012711.

It is not a de Polignac number, because 1172105 - 2¹⁶ = 1106569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172107) 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, 5450 + ... + 5660.

It is an arithmetic number, because the mean of its divisors is an integer number (97308).

2^1172105 is an apocalyptic number.

It is an amenable number.

1172105 is a deficient number, since it is larger than the sum of its proper divisors (384823).

1172105 is a wasteful number, since it uses less digits than its factorization.

1172105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1172105 is about 1082.6379819681. The cubic root of 1172105 is about 105.4359801164.

Adding to 1172105 its reverse (5012711), we get a palindrome (6184816).

Subtracting 1172105 from its reverse (5012711), we obtain a triangular number (3840606 = T₂₇₇₁).

It can be divided in two parts, 117 and 2105, that added together give a palindrome (2222).

The spelling of 1172105 in words is "one million, one hundred seventy-two thousand, one hundred five".