11057287 has 8 divisors (see below), whose sum is σ = 11348480. Its totient is φ = 10769760.

The previous prime is 11057281. The next prime is 11057357. The reversal of 11057287 is 78275011.

It is a happy number.

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 11057287 - 2³ = 11057279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11057281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5818 + ... + 7480.

It is an arithmetic number, because the mean of its divisors is an integer number (1418560).

Almost surely, 2^11057287 is an apocalyptic number.

11057287 is the 1663-rd decagonal number.

11057287 is a deficient number, since it is larger than the sum of its proper divisors (291193).

11057287 is a wasteful number, since it uses less digits than its factorization.

11057287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 11057287 is about 3325.2499154199. The cubic root of 11057287 is about 222.7834169771.

The spelling of 11057287 in words is "eleven million, fifty-seven thousand, two hundred eighty-seven".