1161998 has 8 divisors (see below), whose sum is σ = 1750008. Its totient is φ = 578664.

The previous prime is 1161997. The next prime is 1162009. The reversal of 1161998 is 8991611.

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

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161991) 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, 461 + ... + 1592.

It is an arithmetic number, because the mean of its divisors is an integer number (218751).

2^1161998 is an apocalyptic number.

1161998 is a deficient number, since it is larger than the sum of its proper divisors (588010).

1161998 is a wasteful number, since it uses less digits than its factorization.

1161998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338.

The product of its digits is 3888, while the sum is 35.

The square root of 1161998 is about 1077.9601105792. The cubic root of 1161998 is about 105.1320485291.

The spelling of 1161998 in words is "one million, one hundred sixty-one thousand, nine hundred ninety-eight".