11998481 has 24 divisors (see below), whose sum is σ = 14747040. Its totient is φ = 9694080.

The previous prime is 11998439. The next prime is 11998487. The reversal of 11998481 is 18489911.

It is not a de Polignac number, because 11998481 - 2¹⁸ = 11736337 is a prime.

It is a super-2 number, since 2×11998481² = 287927092614722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11998487) 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 23 ways as a sum of consecutive naturals, for example, 38930 + ... + 39236.

It is an arithmetic number, because the mean of its divisors is an integer number (614460).

Almost surely, 2^11998481 is an apocalyptic number.

11998481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11998481 is a deficient number, since it is larger than the sum of its proper divisors (2748559).

11998481 is a wasteful number, since it uses less digits than its factorization.

11998481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 354 counting only the distinct ones).

The product of its digits is 20736, while the sum is 41.

The square root of 11998481 is about 3463.8823594343. The cubic root of 11998481 is about 228.9331879867.

The spelling of 11998481 in words is "eleven million, nine hundred ninety-eight thousand, four hundred eighty-one".