11917257 has 16 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 7187600.

The previous prime is 11917253. The next prime is 11917259. The reversal of 11917257 is 75271911.

It is a cyclic number.

It is not a de Polignac number, because 11917257 - 2² = 11917253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (11917253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7132 + ... + 8642.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^11917257 is an apocalyptic number.

It is an amenable number.

11917257 is a deficient number, since it is larger than the sum of its proper divisors (5500983).

11917257 is a wasteful number, since it uses less digits than its factorization.

11917257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764.

The product of its digits is 4410, while the sum is 33.

The square root of 11917257 is about 3452.1380331615. The cubic root of 11917257 is about 228.4154283568.

It can be divided in two parts, 1191 and 7257, that added together give a palindrome (8448).

The spelling of 11917257 in words is "eleven million, nine hundred seventeen thousand, two hundred fifty-seven".