1172289 has 4 divisors (see below), whose sum is σ = 1563056. Its totient is φ = 781524.

The previous prime is 1172279. The next prime is 1172317. The reversal of 1172289 is 9822711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9822711 = 3 ⋅3274237.

It is not a de Polignac number, because 1172289 - 2⁴ = 1172273 is a prime.

It is a super-2 number, since 2×1172289² = 2748522999042, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195379 + ... + 195384.

It is an arithmetic number, because the mean of its divisors is an integer number (390764).

2^1172289 is an apocalyptic number.

It is an amenable number.

1172289 is a deficient number, since it is larger than the sum of its proper divisors (390767).

1172289 is an equidigital number, since it uses as much as digits as its factorization.

1172289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390766.

The product of its digits is 2016, while the sum is 30.

The square root of 1172289 is about 1082.7229562543. The cubic root of 1172289 is about 105.4414970298.

It can be divided in two parts, 11722 and 89, that added together give a palindrome (11811).

The spelling of 1172289 in words is "one million, one hundred seventy-two thousand, two hundred eighty-nine".