11997500 has 30 divisors (see below), whose sum is σ = 26241600. Its totient is φ = 4798000.

The previous prime is 11997481. The next prime is 11997523. The reversal of 11997500 is 579911.

11997500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 101 + ... + 4899.

It is an arithmetic number, because the mean of its divisors is an integer number (874720).

Almost surely, 2^11997500 is an apocalyptic number.

11997500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11997500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13120800).

11997500 is an abundant number, since it is smaller than the sum of its proper divisors (14244100).

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

11997500 is an equidigital number, since it uses as much as digits as its factorization.

11997500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823 (or 4806 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 11997500 is about 3463.7407524236. The cubic root of 11997500 is about 228.9269485975.

The spelling of 11997500 in words is "eleven million, nine hundred ninety-seven thousand, five hundred".