11515487 has 4 divisors (see below), whose sum is σ = 11534040. Its totient is φ = 11496936.

The previous prime is 11515481. The next prime is 11515489. The reversal of 11515487 is 78451511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78451511 = 239 ⋅328249.

It is a cyclic number.

It is not a de Polignac number, because 11515487 - 2¹² = 11511391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11515481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8312 + ... + 9597.

It is an arithmetic number, because the mean of its divisors is an integer number (2883510).

Almost surely, 2^11515487 is an apocalyptic number.

11515487 is a deficient number, since it is larger than the sum of its proper divisors (18553).

11515487 is an equidigital number, since it uses as much as digits as its factorization.

11515487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18552.

The product of its digits is 5600, while the sum is 32.

The square root of 11515487 is about 3393.4476568823. The cubic root of 11515487 is about 225.8191507488.

Adding to 11515487 its reverse (78451511), we get a palindrome (89966998).

The spelling of 11515487 in words is "eleven million, five hundred fifteen thousand, four hundred eighty-seven".