1217212160 has 36 divisors (see below), whose sum is σ = 2915606568. Its totient is φ = 486884352.

The previous prime is 1217212153. The next prime is 1217212177. The reversal of 1217212160 is 612127121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474194 + ... + 476753.

Almost surely, 2^1217212160 is an apocalyptic number.

1217212160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1217212160 is an abundant number, since it is smaller than the sum of its proper divisors (1698394408).

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

1217212160 is an frugal number, since it uses more digits than its factorization.

1217212160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950968 (or 950954 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 1217212160 is about 34888.5677550684. The cubic root of 1217212160 is about 1067.7152050552.

Adding to 1217212160 its reverse (612127121), we get a palindrome (1829339281).

The spelling of 1217212160 in words is "one billion, two hundred seventeen million, two hundred twelve thousand, one hundred sixty".