1138911 has 8 divisors (see below), whose sum is σ = 1540224. Its totient is φ = 748440.

The previous prime is 1138901. The next prime is 1138919. The reversal of 1138911 is 1198311.

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

It is not a de Polignac number, because 1138911 - 2¹⁰ = 1137887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138919) 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 7 ways as a sum of consecutive naturals, for example, 2461 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (192528).

2^1138911 is an apocalyptic number.

1138911 is a deficient number, since it is larger than the sum of its proper divisors (401313).

1138911 is an equidigital number, since it uses as much as digits as its factorization.

1138911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421.

The product of its digits is 216, while the sum is 24.

The square root of 1138911 is about 1067.1977323814. The cubic root of 1138911 is about 104.4311184229.

The spelling of 1138911 in words is "one million, one hundred thirty-eight thousand, nine hundred eleven".