13247487 has 12 divisors (see below), whose sum is σ = 20874984. Its totient is φ = 8028720.

The previous prime is 13247477. The next prime is 13247491. The reversal of 13247487 is 78474231.

It is a happy number.

13247487 is a `hidden beast` number, since 132 + 47 + 487 = 666.

It is not a de Polignac number, because 13247487 - 2⁷ = 13247359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13247417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66808 + ... + 67005.

It is an arithmetic number, because the mean of its divisors is an integer number (1739582).

Almost surely, 2^13247487 is an apocalyptic number.

13247487 is a deficient number, since it is larger than the sum of its proper divisors (7627497).

13247487 is a wasteful number, since it uses less digits than its factorization.

13247487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133830 (or 133827 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 13247487 is about 3639.7097411744. The cubic root of 13247487 is about 236.6162137597.

The spelling of 13247487 in words is "thirteen million, two hundred forty-seven thousand, four hundred eighty-seven".