11815487 has 2 divisors, whose sum is σ = 11815488. Its totient is φ = 11815486.

The previous prime is 11815481. The next prime is 11815501. The reversal of 11815487 is 78451811.

It is a weak prime.

It is an emirp because it is prime and its reverse (78451811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11815487 - 2¹² = 11811391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11815481) 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 as a sum of consecutive naturals, namely, 5907743 + 5907744.

It is an arithmetic number, because the mean of its divisors is an integer number (5907744).

Almost surely, 2^11815487 is an apocalyptic number.

11815487 is a deficient number, since it is larger than the sum of its proper divisors (1).

11815487 is an equidigital number, since it uses as much as digits as its factorization.

11815487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 35.

The square root of 11815487 is about 3437.3662883085. The cubic root of 11815487 is about 227.7633676565.

The spelling of 11815487 in words is "eleven million, eight hundred fifteen thousand, four hundred eighty-seven".