11987305 has 16 divisors (see below), whose sum is σ = 15931584. Its totient is φ = 8585280.

The previous prime is 11987299. The next prime is 11987323. The reversal of 11987305 is 50378911.

It is a happy number.

It is not a de Polignac number, because 11987305 - 2⁵ = 11987273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2059 + ... + 5311.

It is an arithmetic number, because the mean of its divisors is an integer number (995724).

Almost surely, 2^11987305 is an apocalyptic number.

It is an amenable number.

11987305 is a deficient number, since it is larger than the sum of its proper divisors (3944279).

11987305 is a wasteful number, since it uses less digits than its factorization.

11987305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 11987305 is about 3462.2687648419. The cubic root of 11987305 is about 228.8620858722.

The spelling of 11987305 in words is "eleven million, nine hundred eighty-seven thousand, three hundred five".