1216265332 has 12 divisors (see below), whose sum is σ = 2185990660. Its totient is φ = 591696576.

The previous prime is 1216265327. The next prime is 1216265333. The reversal of 1216265332 is 2335626121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1134072976 + 82192356 = 33676^2 + 9066^2 .

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1216265294 and 1216265303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216265333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4108857 + ... + 4109152.

Almost surely, 2^1216265332 is an apocalyptic number.

It is an amenable number.

1216265332 is a deficient number, since it is larger than the sum of its proper divisors (969725328).

1216265332 is a wasteful number, since it uses less digits than its factorization.

1216265332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8218050 (or 8218048 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 1216265332 is about 34874.9957992829. The cubic root of 1216265332 is about 1067.4382867756.

The spelling of 1216265332 in words is "one billion, two hundred sixteen million, two hundred sixty-five thousand, three hundred thirty-two".