11657257 has 16 divisors (see below), whose sum is σ = 13001472. Its totient is φ = 10402560.

The previous prime is 11657249. The next prime is 11657273. The reversal of 11657257 is 75275611.

It is a happy number.

It is not a de Polignac number, because 11657257 - 2³ = 11657249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11657227) 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, 26832 + ... + 27262.

It is an arithmetic number, because the mean of its divisors is an integer number (812592).

Almost surely, 2^11657257 is an apocalyptic number.

11657257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11657257 is a deficient number, since it is larger than the sum of its proper divisors (1344215).

11657257 is a wasteful number, since it uses less digits than its factorization.

11657257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its digits is 14700, while the sum is 34.

The square root of 11657257 is about 3414.2725433099. The cubic root of 11657257 is about 226.7420786658.

The spelling of 11657257 in words is "eleven million, six hundred fifty-seven thousand, two hundred fifty-seven".