1187275 has 6 divisors (see below), whose sum is σ = 1472252. Its totient is φ = 949800.

The previous prime is 1187261. The next prime is 1187279. The reversal of 1187275 is 5727811.

It is a happy number.

It is not a de Polignac number, because 1187275 - 2¹⁷ = 1056203 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187279) 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 5 ways as a sum of consecutive naturals, for example, 23721 + ... + 23770.

2^1187275 is an apocalyptic number.

1187275 is a deficient number, since it is larger than the sum of its proper divisors (284977).

1187275 is an equidigital number, since it uses as much as digits as its factorization.

1187275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47501 (or 47496 counting only the distinct ones).

The product of its digits is 3920, while the sum is 31.

The square root of 1187275 is about 1089.6214939143. The cubic root of 1187275 is about 105.8889010414. Note that the first 3 decimals are identical.

The spelling of 1187275 in words is "one million, one hundred eighty-seven thousand, two hundred seventy-five".