1998154 has 8 divisors (see below), whose sum is σ = 3155040. Its totient is φ = 946476.

The previous prime is 1998133. The next prime is 1998169. The reversal of 1998154 is 4518991.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26254 + ... + 26329.

It is an arithmetic number, because the mean of its divisors is an integer number (394380).

2^1998154 is an apocalyptic number.

1998154 is a deficient number, since it is larger than the sum of its proper divisors (1156886).

1998154 is a wasteful number, since it uses less digits than its factorization.

1998154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52604.

The product of its digits is 12960, while the sum is 37.

The square root of 1998154 is about 1413.5607521433. The cubic root of 1998154 is about 125.9533294861.

The spelling of 1998154 in words is "one million, nine hundred ninety-eight thousand, one hundred fifty-four".