11481539 has 4 divisors (see below), whose sum is σ = 11564280. Its totient is φ = 11398800.

The previous prime is 11481527. The next prime is 11481553. The reversal of 11481539 is 93518411.

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

It is a cyclic number.

It is not a de Polignac number, because 11481539 - 2⁴ = 11481523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11481839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41162 + ... + 41439.

It is an arithmetic number, because the mean of its divisors is an integer number (2891070).

Almost surely, 2^11481539 is an apocalyptic number.

11481539 is a deficient number, since it is larger than the sum of its proper divisors (82741).

11481539 is an equidigital number, since it uses as much as digits as its factorization.

11481539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82740.

The product of its digits is 4320, while the sum is 32.

The square root of 11481539 is about 3388.4419723525. The cubic root of 11481539 is about 225.5970251251.

The spelling of 11481539 in words is "eleven million, four hundred eighty-one thousand, five hundred thirty-nine".