1205211166 has 8 divisors (see below), whose sum is σ = 1832581584. Its totient is φ = 594350640.

The previous prime is 1205211071. The next prime is 1205211167. The reversal of 1205211166 is 6611125021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1205211166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205211167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4127290 + ... + 4127581.

It is an arithmetic number, because the mean of its divisors is an integer number (229072698).

Almost surely, 2^1205211166 is an apocalyptic number.

1205211166 is a deficient number, since it is larger than the sum of its proper divisors (627370418).

1205211166 is an equidigital number, since it uses as much as digits as its factorization.

1205211166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8254946.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1205211166 is about 34716.1513707957. The cubic root of 1205211166 is about 1064.1945951345.

Adding to 1205211166 its reverse (6611125021), we get a palindrome (7816336187).

The spelling of 1205211166 in words is "one billion, two hundred five million, two hundred eleven thousand, one hundred sixty-six".