11987517 has 8 divisors (see below), whose sum is σ = 16026624. Its totient is φ = 7970048.

The previous prime is 11987501. The next prime is 11987579. The reversal of 11987517 is 71578911.

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

It is a cyclic number.

It is not a de Polignac number, because 11987517 - 2⁴ = 11987501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11988517) 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, 4068 + ... + 6365.

It is an arithmetic number, because the mean of its divisors is an integer number (2003328).

Almost surely, 2^11987517 is an apocalyptic number.

It is an amenable number.

11987517 is a deficient number, since it is larger than the sum of its proper divisors (4039107).

11987517 is a wasteful number, since it uses less digits than its factorization.

11987517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10819.

The product of its digits is 17640, while the sum is 39.

The square root of 11987517 is about 3462.2993804696. The cubic root of 11987517 is about 228.8634350350.

The spelling of 11987517 in words is "eleven million, nine hundred eighty-seven thousand, five hundred seventeen".