11157247 has 4 divisors (see below), whose sum is σ = 11310160. Its totient is φ = 11004336.

The previous prime is 11157229. The next prime is 11157259. The reversal of 11157247 is 74275111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74275111 = 2237 ⋅33203.

It is a cyclic number.

It is not a de Polignac number, because 11157247 - 2⁷ = 11157119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11157217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76347 + ... + 76492.

It is an arithmetic number, because the mean of its divisors is an integer number (2827540).

Almost surely, 2^11157247 is an apocalyptic number.

11157247 is a deficient number, since it is larger than the sum of its proper divisors (152913).

11157247 is an equidigital number, since it uses as much as digits as its factorization.

11157247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152912.

The product of its digits is 1960, while the sum is 28.

The square root of 11157247 is about 3340.2465477866. The cubic root of 11157247 is about 223.4527390490.

The spelling of 11157247 in words is "eleven million, one hundred fifty-seven thousand, two hundred forty-seven".