11291157 has 10 divisors (see below), whose sum is σ = 16867158. Its totient is φ = 7527384.

The previous prime is 11291143. The next prime is 11291167. The reversal of 11291157 is 75119211.

It can be written as a sum of positive squares in only one way, i.e., 8242641 + 3048516 = 2871^2 + 1746^2 .

It is not a de Polignac number, because 11291157 - 2⁷ = 11291029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 11291157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11291117) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 69618 + ... + 69779.

Almost surely, 2^11291157 is an apocalyptic number.

It is an amenable number.

11291157 is a deficient number, since it is larger than the sum of its proper divisors (5576001).

11291157 is an equidigital number, since it uses as much as digits as its factorization.

11291157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139409 (or 139400 counting only the distinct ones).

The product of its digits is 630, while the sum is 27.

The square root of 11291157 is about 3360.2316884405. The cubic root of 11291157 is about 224.3431509742.

The spelling of 11291157 in words is "eleven million, two hundred ninety-one thousand, one hundred fifty-seven".