11497221 has 10 divisors (see below), whose sum is σ = 17174982. Its totient is φ = 7664760.

The previous prime is 11497207. The next prime is 11497229. The reversal of 11497221 is 12279411.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 408321 = 3330^2 + 639^2 .

It is not a de Polignac number, because 11497221 - 2¹¹ = 11495173 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11497229) 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, 70890 + ... + 71051.

Almost surely, 2^11497221 is an apocalyptic number.

It is an amenable number.

11497221 is a deficient number, since it is larger than the sum of its proper divisors (5677761).

11497221 is an equidigital number, since it uses as much as digits as its factorization.

11497221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141953 (or 141944 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 11497221 is about 3390.7552256098. The cubic root of 11497221 is about 225.6996885708.

The spelling of 11497221 in words is "eleven million, four hundred ninety-seven thousand, two hundred twenty-one".