1099138 has 4 divisors (see below), whose sum is σ = 1648710. Its totient is φ = 549568.

The previous prime is 1099121. The next prime is 1099139. The reversal of 1099138 is 8319901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 667489 + 431649 = 817^2 + 657^2 .

It is not an unprimeable number, because it can be changed into a prime (1099139) 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 as a sum of consecutive naturals, namely, 274783 + ... + 274786.

2^1099138 is an apocalyptic number.

1099138 is a deficient number, since it is larger than the sum of its proper divisors (549572).

1099138 is an equidigital number, since it uses as much as digits as its factorization.

1099138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549571.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1099138 is about 1048.3978252553. The cubic root of 1099138 is about 103.2010400913.

The spelling of 1099138 in words is "one million, ninety-nine thousand, one hundred thirty-eight".