11767221 has 16 divisors (see below), whose sum is σ = 17905600. Its totient is φ = 7632144.

The previous prime is 11767211. The next prime is 11767229. The reversal of 11767221 is 12276711.

It is not a de Polignac number, because 11767221 - 2⁶ = 11767157 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11767229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4891 + ... + 6888.

It is an arithmetic number, because the mean of its divisors is an integer number (1119100).

Almost surely, 2^11767221 is an apocalyptic number.

It is an amenable number.

11767221 is a deficient number, since it is larger than the sum of its proper divisors (6138379).

11767221 is a wasteful number, since it uses less digits than its factorization.

11767221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11825 (or 11819 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 11767221 is about 3430.3383215071. The cubic root of 11767221 is about 227.4528083091.

The spelling of 11767221 in words is "eleven million, seven hundred sixty-seven thousand, two hundred twenty-one".