11156197 has 12 divisors (see below), whose sum is σ = 12174624. Its totient is φ = 10218000.

The previous prime is 11156179. The next prime is 11156207. The reversal of 11156197 is 79165111.

It is not a de Polignac number, because 11156197 - 2¹⁹ = 10631909 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 (11156137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42288 + ... + 42550.

It is an arithmetic number, because the mean of its divisors is an integer number (1014552).

Almost surely, 2^11156197 is an apocalyptic number.

It is an amenable number.

11156197 is a deficient number, since it is larger than the sum of its proper divisors (1018427).

11156197 is a wasteful number, since it uses less digits than its factorization.

11156197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 527 counting only the distinct ones).

The product of its digits is 1890, while the sum is 31.

The square root of 11156197 is about 3340.0893700618. The cubic root of 11156197 is about 223.4457291735.

The spelling of 11156197 in words is "eleven million, one hundred fifty-six thousand, one hundred ninety-seven".