1216712148 has 24 divisors (see below), whose sum is σ = 2842476000. Its totient is φ = 405073440.

The previous prime is 1216712137. The next prime is 1216712183. The reversal of 1216712148 is 8412176121.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 51898 + ... + 71601.

It is an arithmetic number, because the mean of its divisors is an integer number (118436500).

Almost surely, 2^1216712148 is an apocalyptic number.

It is an amenable number.

1216712148 is an abundant number, since it is smaller than the sum of its proper divisors (1625763852).

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

1216712148 is a wasteful number, since it uses less digits than its factorization.

1216712148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124327 (or 124325 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 1216712148 is about 34881.4011759849. The cubic root of 1216712148 is about 1067.5689847135.

Adding to 1216712148 its reverse (8412176121), we get a palindrome (9628888269).

The spelling of 1216712148 in words is "one billion, two hundred sixteen million, seven hundred twelve thousand, one hundred forty-eight".