11787291 has 6 divisors (see below), whose sum is σ = 17026100. Its totient is φ = 7858188.

The previous prime is 11787287. The next prime is 11787299. The reversal of 11787291 is 19278711.

It is not a de Polignac number, because 11787291 - 2² = 11787287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11787299) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654841 + ... + 654858.

Almost surely, 2^11787291 is an apocalyptic number.

11787291 is a deficient number, since it is larger than the sum of its proper divisors (5238809).

11787291 is a wasteful number, since it uses less digits than its factorization.

11787291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309705 (or 1309702 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 11787291 is about 3433.2624426338. The cubic root of 11787291 is about 227.5820482545.

The spelling of 11787291 in words is "eleven million, seven hundred eighty-seven thousand, two hundred ninety-one".