11971598 has 4 divisors (see below), whose sum is σ = 17957400. Its totient is φ = 5985798.

The previous prime is 11971567. The next prime is 11971607. The reversal of 11971598 is 89517911.

11971598 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2992898 + ... + 2992901.

It is an arithmetic number, because the mean of its divisors is an integer number (4489350).

Almost surely, 2^11971598 is an apocalyptic number.

11971598 is a deficient number, since it is larger than the sum of its proper divisors (5985802).

11971598 is an equidigital number, since it uses as much as digits as its factorization.

11971598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5985801.

The product of its digits is 22680, while the sum is 41.

The square root of 11971598 is about 3459.9997109826. Note that the first 3 decimals coincide. The cubic root of 11971598 is about 228.7620826329.

It can be divided in two parts, 119 and 71598, that added together give a palindrome (71717).

The spelling of 11971598 in words is "eleven million, nine hundred seventy-one thousand, five hundred ninety-eight".