1138145 has 4 divisors (see below), whose sum is σ = 1365780. Its totient is φ = 910512.

The previous prime is 1138141. The next prime is 1138147. The reversal of 1138145 is 5418311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5418311 = 1277 ⋅4243.

It can be written as a sum of positive squares in 2 ways, for example, as 891136 + 247009 = 944^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138145 - 2² = 1138141 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1138145.

It is not an unprimeable number, because it can be changed into a prime (1138141) 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 3 ways as a sum of consecutive naturals, for example, 113810 + ... + 113819.

It is an arithmetic number, because the mean of its divisors is an integer number (341445).

2^1138145 is an apocalyptic number.

It is an amenable number.

1138145 is a deficient number, since it is larger than the sum of its proper divisors (227635).

1138145 is an equidigital number, since it uses as much as digits as its factorization.

1138145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227634.

The product of its digits is 480, while the sum is 23.

The square root of 1138145 is about 1066.8387881962. The cubic root of 1138145 is about 104.4077006793.

The spelling of 1138145 in words is "one million, one hundred thirty-eight thousand, one hundred forty-five".