1111998 has 16 divisors (see below), whose sum is σ = 2284560. Its totient is φ = 360576.

The previous prime is 1111991. The next prime is 1112003. The reversal of 1111998 is 8991111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111991) 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, 2283 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (142785).

2^1111998 is an apocalyptic number.

1111998 is an abundant number, since it is smaller than the sum of its proper divisors (1172562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111998 is a wasteful number, since it uses less digits than its factorization.

1111998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051.

The product of its digits is 648, while the sum is 30.

The square root of 1111998 is about 1054.5131578126. The cubic root of 1111998 is about 103.6019672360.

The spelling of 1111998 in words is "one million, one hundred eleven thousand, nine hundred ninety-eight".