1211166 has 32 divisors (see below), whose sum is σ = 2937600. Its totient is φ = 366840.

The previous prime is 1211141. The next prime is 1211167. The reversal of 1211166 is 6611121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211167) 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, 426 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (91800).

2^1211166 is an apocalyptic number.

1211166 is an abundant number, since it is smaller than the sum of its proper divisors (1726434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211166 is a wasteful number, since it uses less digits than its factorization.

1211166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2055 counting only the distinct ones).

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

The square root of 1211166 is about 1100.5298723797. The cubic root of 1211166 is about 106.5944411234.

Adding to 1211166 its reverse (6611121), we get a palindrome (7822287).

The spelling of 1211166 in words is "one million, two hundred eleven thousand, one hundred sixty-six".