11481591 has 16 divisors (see below), whose sum is σ = 16853760. Its totient is φ = 6894720.

The previous prime is 11481571. The next prime is 11481607. The reversal of 11481591 is 19518411.

It is a happy number.

11481591 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11481591 - 2⁶ = 11481527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11481521) 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, 2190 + ... + 5268.

It is an arithmetic number, because the mean of its divisors is an integer number (1053360).

Almost surely, 2^11481591 is an apocalyptic number.

11481591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11481591 is a deficient number, since it is larger than the sum of its proper divisors (5372169).

11481591 is a wasteful number, since it uses less digits than its factorization.

11481591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206.

The product of its digits is 1440, while the sum is 30.

The square root of 11481591 is about 3388.4496454869. The cubic root of 11481591 is about 225.5973657016.

The spelling of 11481591 in words is "eleven million, four hundred eighty-one thousand, five hundred ninety-one".