11887481 has 4 divisors (see below), whose sum is σ = 12404352. Its totient is φ = 11370612.

The previous prime is 11887457. The next prime is 11887489. The reversal of 11887481 is 18478811.

11887481 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11887481 - 2¹⁸ = 11625337 is a prime.

It is a super-2 number, since 2×11887481² = 282624409050722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11887489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258401 + ... + 258446.

It is an arithmetic number, because the mean of its divisors is an integer number (3101088).

Almost surely, 2^11887481 is an apocalyptic number.

It is an amenable number.

11887481 is a deficient number, since it is larger than the sum of its proper divisors (516871).

11887481 is an equidigital number, since it uses as much as digits as its factorization.

11887481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516870.

The product of its digits is 14336, while the sum is 38.

The square root of 11887481 is about 3447.8226462508. The cubic root of 11887481 is about 228.2250330290.

The spelling of 11887481 in words is "eleven million, eight hundred eighty-seven thousand, four hundred eighty-one".