1121998 has 8 divisors (see below), whose sum is σ = 1688400. Its totient is φ = 559200.

The previous prime is 1121993. The next prime is 1122001. The reversal of 1121998 is 8991211.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121993) by changing a digit.

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, 103 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (211050).

2^1121998 is an apocalyptic number.

1121998 is a deficient number, since it is larger than the sum of its proper divisors (566402).

1121998 is a wasteful number, since it uses less digits than its factorization.

1121998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802.

The product of its digits is 1296, while the sum is 31.

The square root of 1121998 is about 1059.2440700802. The cubic root of 1121998 is about 103.9115989426.

The spelling of 1121998 in words is "one million, one hundred twenty-one thousand, nine hundred ninety-eight".