11487561 has 8 divisors (see below), whose sum is σ = 15372384. Its totient is φ = 7630560.

The previous prime is 11487491. The next prime is 11487569. The reversal of 11487561 is 16578411.

It is a happy number.

11487561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11487561 - 2¹⁰ = 11486537 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11487569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5971 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (1921548).

Almost surely, 2^11487561 is an apocalyptic number.

It is an amenable number.

11487561 is a deficient number, since it is larger than the sum of its proper divisors (3884823).

11487561 is a wasteful number, since it uses less digits than its factorization.

11487561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13911.

The product of its digits is 6720, while the sum is 33.

The square root of 11487561 is about 3389.3304648559. The cubic root of 11487561 is about 225.6364596712.

The spelling of 11487561 in words is "eleven million, four hundred eighty-seven thousand, five hundred sixty-one".