1135998 has 32 divisors (see below), whose sum is σ = 2560800. Its totient is φ = 373248.

The previous prime is 1135997. The next prime is 1135999. The reversal of 1135998 is 8995311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1135997) and next prime (1135999).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5790 + ... + 5982.

It is an arithmetic number, because the mean of its divisors is an integer number (80025).

2^1135998 is an apocalyptic number.

1135998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1135998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280400).

1135998 is an abundant number, since it is smaller than the sum of its proper divisors (1424802).

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

1135998 is a wasteful number, since it uses less digits than its factorization.

1135998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 307 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1135998 is about 1065.8320693242. The cubic root of 1135998 is about 104.3420076919.

The spelling of 1135998 in words is "one million, one hundred thirty-five thousand, nine hundred ninety-eight".