1138155 has 16 divisors (see below), whose sum is σ = 1900800. Its totient is φ = 580448.

The previous prime is 1138147. The next prime is 1138171. The reversal of 1138155 is 5518311.

It is a cyclic number.

It is not a de Polignac number, because 1138155 - 2³ = 1138147 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1305 + ... + 1994.

It is an arithmetic number, because the mean of its divisors is an integer number (118800).

2^1138155 is an apocalyptic number.

1138155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1138155 is a deficient number, since it is larger than the sum of its proper divisors (762645).

1138155 is a wasteful number, since it uses less digits than its factorization.

1138155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330.

The product of its digits is 600, while the sum is 24.

The square root of 1138155 is about 1066.8434749297. The cubic root of 1138155 is about 104.4080064616.

The spelling of 1138155 in words is "one million, one hundred thirty-eight thousand, one hundred fifty-five".