1129887 has 24 divisors (see below), whose sum is σ = 1813968. Its totient is φ = 672000.

The previous prime is 1129861. The next prime is 1129889. The reversal of 1129887 is 7889211.

It is not a de Polignac number, because 1129887 - 2¹⁸ = 867743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129889) 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 23 ways as a sum of consecutive naturals, for example, 9943 + ... + 10055.

It is an arithmetic number, because the mean of its divisors is an integer number (75582).

2^1129887 is an apocalyptic number.

1129887 is a deficient number, since it is larger than the sum of its proper divisors (684081).

1129887 is a wasteful number, since it uses less digits than its factorization.

1129887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 228 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1129887 is about 1062.9614292156. The cubic root of 1129887 is about 104.1545716801.

It can be divided in two parts, 1129 and 887, that added together give a triangular number (2016 = T₆₃).

The spelling of 1129887 in words is "one million, one hundred twenty-nine thousand, eight hundred eighty-seven".