1098239 has 4 divisors (see below), whose sum is σ = 1106280. Its totient is φ = 1090200.

The previous prime is 1098233. The next prime is 1098269. The reversal of 1098239 is 9328901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9328901 = 53 ⋅176017.

It is a cyclic number.

It is not a de Polignac number, because 1098239 - 2⁸ = 1097983 is a prime.

It is a super-2 number, since 2×1098239² = 2412257802242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3812 + ... + 4089.

It is an arithmetic number, because the mean of its divisors is an integer number (276570).

2^1098239 is an apocalyptic number.

1098239 is a deficient number, since it is larger than the sum of its proper divisors (8041).

1098239 is an equidigital number, since it uses as much as digits as its factorization.

1098239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1098239 is about 1047.9689880908. The cubic root of 1098239 is about 103.1728959027.

The spelling of 1098239 in words is "one million, ninety-eight thousand, two hundred thirty-nine".