11643257 has 8 divisors (see below), whose sum is σ = 12412800. Its totient is φ = 10889424.

The previous prime is 11643251. The next prime is 11643293. The reversal of 11643257 is 75234611.

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 11643257 - 2⁴ = 11643241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11643251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2378 + ... + 5379.

It is an arithmetic number, because the mean of its divisors is an integer number (1551600).

Almost surely, 2^11643257 is an apocalyptic number.

It is an amenable number.

11643257 is a deficient number, since it is larger than the sum of its proper divisors (769543).

11643257 is an equidigital number, since it uses as much as digits as its factorization.

11643257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855.

The product of its digits is 5040, while the sum is 29.

The square root of 11643257 is about 3412.2217102644. The cubic root of 11643257 is about 226.6512722628.

Adding to 11643257 its reverse (75234611), we get a palindrome (86877868).

The spelling of 11643257 in words is "eleven million, six hundred forty-three thousand, two hundred fifty-seven".