1098409 has 8 divisors (see below), whose sum is σ = 1245440. Its totient is φ = 960336.

The previous prime is 1098401. The next prime is 1098439. The reversal of 1098409 is 9048901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1098409 - 2³ = 1098401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1977 + ... + 2470.

It is an arithmetic number, because the mean of its divisors is an integer number (155680).

2^1098409 is an apocalyptic number.

1098409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1098409 is a deficient number, since it is larger than the sum of its proper divisors (147031).

1098409 is a wasteful number, since it uses less digits than its factorization.

1098409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4479.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1098409 is about 1048.0500942226. The cubic root of 1098409 is about 103.1782191179.

The spelling of 1098409 in words is "one million, ninety-eight thousand, four hundred nine".