11487521 has 4 divisors (see below), whose sum is σ = 11575344. Its totient is φ = 11399700.

The previous prime is 11487491. The next prime is 11487569. The reversal of 11487521 is 12578411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12578411 = 73 ⋅172307.

It is a cyclic number.

It is not a de Polignac number, because 11487521 - 2²² = 7293217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11487821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43715 + ... + 43976.

It is an arithmetic number, because the mean of its divisors is an integer number (2893836).

Almost surely, 2^11487521 is an apocalyptic number.

It is an amenable number.

11487521 is a deficient number, since it is larger than the sum of its proper divisors (87823).

11487521 is an equidigital number, since it uses as much as digits as its factorization.

11487521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87822.

The product of its digits is 2240, while the sum is 29.

The square root of 11487521 is about 3389.3245639803. The cubic root of 11487521 is about 225.6361977801.

The spelling of 11487521 in words is "eleven million, four hundred eighty-seven thousand, five hundred twenty-one".