11205987 has 8 divisors (see below), whose sum is σ = 16090704. Its totient is φ = 6895968.

The previous prime is 11205979. The next prime is 11206021. The reversal of 11205987 is 78950211.

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

It is not a de Polignac number, because 11205987 - 2³ = 11205979 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11205287) 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, 143628 + ... + 143705.

It is an arithmetic number, because the mean of its divisors is an integer number (2011338).

Almost surely, 2^11205987 is an apocalyptic number.

11205987 is a deficient number, since it is larger than the sum of its proper divisors (4884717).

11205987 is a wasteful number, since it uses less digits than its factorization.

11205987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287349.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 11205987 is about 3347.5344658420. The cubic root of 11205987 is about 223.7776479261. Note that the first 3 decimals are identical.

The spelling of 11205987 in words is "eleven million, two hundred five thousand, nine hundred eighty-seven".