1172287 has 4 divisors (see below), whose sum is σ = 1223280. Its totient is φ = 1121296.

The previous prime is 1172279. The next prime is 1172317. The reversal of 1172287 is 7822711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7822711 = 13 ⋅601747.

It is not a de Polignac number, because 1172287 - 2³ = 1172279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172207) 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, 25462 + ... + 25507.

It is an arithmetic number, because the mean of its divisors is an integer number (305820).

2^1172287 is an apocalyptic number.

1172287 is a deficient number, since it is larger than the sum of its proper divisors (50993).

1172287 is an equidigital number, since it uses as much as digits as its factorization.

1172287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50992.

The product of its digits is 1568, while the sum is 28.

The square root of 1172287 is about 1082.7220326566. The cubic root of 1172287 is about 105.4414370665.

Adding to 1172287 its reverse (7822711), we get a palindrome (8994998).

The spelling of 1172287 in words is "one million, one hundred seventy-two thousand, two hundred eighty-seven".