1212606636 has 12 divisors (see below), whose sum is σ = 2829415512. Its totient is φ = 404202208.

The previous prime is 1212606631. The next prime is 1212606643. The reversal of 1212606636 is 6366062121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1212606597 and 1212606606.

It is not an unprimeable number, because it can be changed into a prime (1212606631) by changing a digit.

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, 50525265 + ... + 50525288.

It is an arithmetic number, because the mean of its divisors is an integer number (235784626).

Almost surely, 2^1212606636 is an apocalyptic number.

It is an amenable number.

1212606636 is an abundant number, since it is smaller than the sum of its proper divisors (1616808876).

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

1212606636 is a wasteful number, since it uses less digits than its factorization.

1212606636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101050560 (or 101050558 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1212606636 is about 34822.5018630195. The cubic root of 1212606636 is about 1066.3668772530.

Adding to 1212606636 its reverse (6366062121), we get a palindrome (7578668757).

The spelling of 1212606636 in words is "one billion, two hundred twelve million, six hundred six thousand, six hundred thirty-six".