1128787 has 8 divisors (see below), whose sum is σ = 1246320. Its totient is φ = 1013760.

The previous prime is 1128781. The next prime is 1128811. The reversal of 1128787 is 7878211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1128787 - 2³ = 1128779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403 + ... + 1555.

It is an arithmetic number, because the mean of its divisors is an integer number (155790).

2^1128787 is an apocalyptic number.

1128787 is a deficient number, since it is larger than the sum of its proper divisors (117533).

1128787 is a wasteful number, since it uses less digits than its factorization.

1128787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253.

The product of its digits is 6272, while the sum is 34.

The square root of 1128787 is about 1062.4438808709. The cubic root of 1128787 is about 104.1207608569.

Subtracting from 1128787 its sum of digits (34), we obtain a triangular number (1128753 = T₁₅₀₂).

The spelling of 1128787 in words is "one million, one hundred twenty-eight thousand, seven hundred eighty-seven".