1138825 has 6 divisors (see below), whose sum is σ = 1412174. Its totient is φ = 911040.

The previous prime is 1138793. The next prime is 1138829. The reversal of 1138825 is 5288311.

It can be written as a sum of positive squares in 3 ways, for example, as 170569 + 968256 = 413^2 + 984^2 .

It is not a de Polignac number, because 1138825 - 2⁵ = 1138793 is a prime.

It is a Duffinian number.

1138825 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1138793 and 1138802.

It is not an unprimeable number, because it can be changed into a prime (1138829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22752 + ... + 22801.

2^1138825 is an apocalyptic number.

It is an amenable number.

1138825 is a deficient number, since it is larger than the sum of its proper divisors (273349).

1138825 is an equidigital number, since it uses as much as digits as its factorization.

1138825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45563 (or 45558 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 1138825 is about 1067.1574391813. The cubic root of 1138825 is about 104.4284898001.

The spelling of 1138825 in words is "one million, one hundred thirty-eight thousand, eight hundred twenty-five".