1098217 has 4 divisors (see below), whose sum is σ = 1162836. Its totient is φ = 1033600.

The previous prime is 1098211. The next prime is 1098221. The reversal of 1098217 is 7128901.

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

It can be written as a sum of positive squares in 2 ways, for example, as 929296 + 168921 = 964^2 + 411^2 .

It is not a de Polignac number, because 1098217 - 2¹⁹ = 573929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098211) 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, 32284 + ... + 32317.

It is an arithmetic number, because the mean of its divisors is an integer number (290709).

2^1098217 is an apocalyptic number.

1098217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1098217 is a deficient number, since it is larger than the sum of its proper divisors (64619).

1098217 is an equidigital number, since it uses as much as digits as its factorization.

1098217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64618.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1098217 is about 1047.9584915444. The cubic root of 1098217 is about 103.1722069759.

The spelling of 1098217 in words is "one million, ninety-eight thousand, two hundred seventeen".