1171287 has 32 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 695520.

The previous prime is 1171267. The next prime is 1171301. The reversal of 1171287 is 7821711.

It is not a de Polignac number, because 1171287 - 2⁸ = 1171031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

1171287 is a modest number, since divided by 1287 gives 117 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1171287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16462 + ... + 16532.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2^1171287 is an apocalyptic number.

1171287 is a deficient number, since it is larger than the sum of its proper divisors (764073).

1171287 is a wasteful number, since it uses less digits than its factorization.

1171287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 134 counting only the distinct ones).

The product of its digits is 784, while the sum is 27.

The square root of 1171287 is about 1082.2601350877. The cubic root of 1171287 is about 105.4114468471.

Adding to 1171287 its reverse (7821711), we get a palindrome (8992998).

The spelling of 1171287 in words is "one million, one hundred seventy-one thousand, two hundred eighty-seven".