1215171066 has 16 divisors (see below), whose sum is σ = 2431797984. Its totient is φ = 404814384.

The previous prime is 1215171059. The next prime is 1215171091. The reversal of 1215171066 is 6601715121.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49656 + ... + 69971.

It is an arithmetic number, because the mean of its divisors is an integer number (151987374).

Almost surely, 2^1215171066 is an apocalyptic number.

1215171066 is an abundant number, since it is smaller than the sum of its proper divisors (1216626918).

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

1215171066 is a wasteful number, since it uses less digits than its factorization.

1215171066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121325.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1215171066 is about 34859.3038656827. The cubic root of 1215171066 is about 1067.1180682981.

Adding to 1215171066 its reverse (6601715121), we get a palindrome (7816886187).

The spelling of 1215171066 in words is "one billion, two hundred fifteen million, one hundred seventy-one thousand, sixty-six".