1212617166 has 16 divisors (see below), whose sum is σ = 2430500688. Its totient is φ = 403328000.

The previous prime is 1212617141. The next prime is 1212617167. The reversal of 1212617166 is 6617162121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212617167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216435 + ... + 221966.

It is an arithmetic number, because the mean of its divisors is an integer number (151906293).

Almost surely, 2^1212617166 is an apocalyptic number.

1212617166 is an abundant number, since it is smaller than the sum of its proper divisors (1217883522).

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

1212617166 is a wasteful number, since it uses less digits than its factorization.

1212617166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438867.

The product of its digits is 6048, while the sum is 33.

The square root of 1212617166 is about 34822.6530580311. The cubic root of 1212617166 is about 1066.3699639398.

Adding to 1212617166 its reverse (6617162121), we get a palindrome (7829779287).

It can be divided in two parts, 12126 and 17166, that added together give a palindrome (29292).

The spelling of 1212617166 in words is "one billion, two hundred twelve million, six hundred seventeen thousand, one hundred sixty-six".