1209998 has 8 divisors (see below), whose sum is σ = 1823808. Its totient is φ = 602064.

The previous prime is 1209979. The next prime is 1210003. The reversal of 1209998 is 8999021.

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

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911 + ... + 1802.

It is an arithmetic number, because the mean of its divisors is an integer number (227976).

2^1209998 is an apocalyptic number.

1209998 is a deficient number, since it is larger than the sum of its proper divisors (613810).

1209998 is a wasteful number, since it uses less digits than its factorization.

1209998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1209998 is about 1099.9990909087. Note that the first 3 decimals coincide. The cubic root of 1209998 is about 106.5601649658.

The spelling of 1209998 in words is "one million, two hundred nine thousand, nine hundred ninety-eight".