11661201 has 24 divisors (see below), whose sum is σ = 17971200. Its totient is φ = 7261056.

The previous prime is 11661197. The next prime is 11661229. The reversal of 11661201 is 10216611.

11661201 is a `hidden beast` number, since 1 + 1 + 661 + 2 + 0 + 1 = 666.

It is not a de Polignac number, because 11661201 - 2² = 11661197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11661241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30256 + ... + 30638.

It is an arithmetic number, because the mean of its divisors is an integer number (748800).

Almost surely, 2^11661201 is an apocalyptic number.

It is an amenable number.

11661201 is a deficient number, since it is larger than the sum of its proper divisors (6309999).

11661201 is a wasteful number, since it uses less digits than its factorization.

11661201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 11661201 is about 3414.8500699152. The cubic root of 11661201 is about 226.7676469999.

Adding to 11661201 its reverse (10216611), we get a palindrome (21877812).

The spelling of 11661201 in words is "eleven million, six hundred sixty-one thousand, two hundred one".