1216901060 has 12 divisors (see below), whose sum is σ = 2555492268. Its totient is φ = 486760416.

The previous prime is 1216901047. The next prime is 1216901083. The reversal of 1216901060 is 601096121.

It can be written as a sum of positive squares in 2 ways, for example, as 502835776 + 714065284 = 22424^2 + 26722^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30422507 + ... + 30422546.

It is an arithmetic number, because the mean of its divisors is an integer number (212957689).

Almost surely, 2^1216901060 is an apocalyptic number.

1216901060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216901060 is an abundant number, since it is smaller than the sum of its proper divisors (1338591208).

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

1216901060 is a wasteful number, since it uses less digits than its factorization.

1216901060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60845062 (or 60845060 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1216901060 is about 34884.1089896245. The cubic root of 1216901060 is about 1067.6242336496.

Adding to 1216901060 its reverse (601096121), we get a palindrome (1817997181).

The spelling of 1216901060 in words is "one billion, two hundred sixteen million, nine hundred one thousand, sixty".