11787081 has 4 divisors (see below), whose sum is σ = 15716112. Its totient is φ = 7858052.

The previous prime is 11787077. The next prime is 11787121. The reversal of 11787081 is 18078711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11787081 - 2² = 11787077 is a prime.

It is a super-2 number, since 2×11787081² = 277870557001122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11787481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1964511 + ... + 1964516.

It is an arithmetic number, because the mean of its divisors is an integer number (3929028).

Almost surely, 2^11787081 is an apocalyptic number.

It is an amenable number.

11787081 is a deficient number, since it is larger than the sum of its proper divisors (3929031).

11787081 is an equidigital number, since it uses as much as digits as its factorization.

11787081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929030.

The product of its (nonzero) digits is 3136, while the sum is 33.

The square root of 11787081 is about 3433.2318593419. The cubic root of 11787081 is about 227.5806967278.

The spelling of 11787081 in words is "eleven million, seven hundred eighty-seven thousand, eighty-one".