11157257 has 4 divisors (see below), whose sum is σ = 11542020. Its totient is φ = 10772496.

The previous prime is 11157229. The next prime is 11157259. The reversal of 11157257 is 75275111.

11157257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75275111 = 7129 ⋅10559.

It can be written as a sum of positive squares in 2 ways, for example, as 8904256 + 2253001 = 2984^2 + 1501^2 .

It is a cyclic number.

It is not a de Polignac number, because 11157257 - 2⁶ = 11157193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 384733 = 11157257 / (1 + 1 + 1 + 5 + 7 + 2 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11157259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192338 + ... + 192395.

It is an arithmetic number, because the mean of its divisors is an integer number (2885505).

Almost surely, 2^11157257 is an apocalyptic number.

It is an amenable number.

11157257 is a deficient number, since it is larger than the sum of its proper divisors (384763).

11157257 is an equidigital number, since it uses as much as digits as its factorization.

11157257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384762.

The product of its digits is 2450, while the sum is 29.

The square root of 11157257 is about 3340.2480446817. The cubic root of 11157257 is about 223.4528058076.

The spelling of 11157257 in words is "eleven million, one hundred fifty-seven thousand, two hundred fifty-seven".