1098139 has 12 divisors (see below), whose sum is σ = 1299144. Its totient is φ = 925344.

The previous prime is 1098133. The next prime is 1098151. The reversal of 1098139 is 9318901.

It is not a de Polignac number, because 1098139 - 2⁹ = 1097627 is a prime.

1098139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1098139.

It is not an unprimeable number, because it can be changed into a prime (1098133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3424 + ... + 3730.

It is an arithmetic number, because the mean of its divisors is an integer number (108262).

2^1098139 is an apocalyptic number.

1098139 is a deficient number, since it is larger than the sum of its proper divisors (201005).

1098139 is an equidigital number, since it uses as much as digits as its factorization.

1098139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 387 counting only the distinct ones).

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

The square root of 1098139 is about 1047.9212756691. The cubic root of 1098139 is about 103.1697643431.

The spelling of 1098139 in words is "one million, ninety-eight thousand, one hundred thirty-nine".