11571197 has 4 divisors (see below), whose sum is σ = 12623136. Its totient is φ = 10519260.

The previous prime is 11571187. The next prime is 11571199. The reversal of 11571197 is 79117511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79117511 = 11 ⋅7192501.

It is a cyclic number.

It is not a de Polignac number, because 11571197 - 2⁴ = 11571181 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 (11571199) 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, 525953 + ... + 525974.

It is an arithmetic number, because the mean of its divisors is an integer number (3155784).

Almost surely, 2^11571197 is an apocalyptic number.

It is an amenable number.

11571197 is a deficient number, since it is larger than the sum of its proper divisors (1051939).

11571197 is a wasteful number, since it uses less digits than its factorization.

11571197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051938.

The product of its digits is 2205, while the sum is 32.

The square root of 11571197 is about 3401.6462191122. The cubic root of 11571197 is about 226.1827235030.

The spelling of 11571197 in words is "eleven million, five hundred seventy-one thousand, one hundred ninety-seven".