1138687 has 8 divisors (see below), whose sum is σ = 1263312. Its totient is φ = 1017600.

The previous prime is 1138681. The next prime is 1138703. The reversal of 1138687 is 7868311.

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

It is a cyclic number.

It is not a de Polignac number, because 1138687 - 2³ = 1138679 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138681) 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, 178 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (157914).

2^1138687 is an apocalyptic number.

1138687 is a deficient number, since it is larger than the sum of its proper divisors (124625).

1138687 is a wasteful number, since it uses less digits than its factorization.

1138687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769.

The product of its digits is 8064, while the sum is 34.

The square root of 1138687 is about 1067.0927794714. The cubic root of 1138687 is about 104.4242715009.

The spelling of 1138687 in words is "one million, one hundred thirty-eight thousand, six hundred eighty-seven".