1212645436 has 12 divisors (see below), whose sum is σ = 2233820680. Its totient is φ = 574410960.

The previous prime is 1212645431. The next prime is 1212645463. The reversal of 1212645436 is 6345462121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212645431) by changing a digit.

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, 7977855 + ... + 7978006.

Almost surely, 2^1212645436 is an apocalyptic number.

It is an amenable number.

1212645436 is a deficient number, since it is larger than the sum of its proper divisors (1021175244).

1212645436 is a wasteful number, since it uses less digits than its factorization.

1212645436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15955884 (or 15955882 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 1212645436 is about 34823.0589695966. The cubic root of 1212645436 is about 1066.3782507115.

The spelling of 1212645436 in words is "one billion, two hundred twelve million, six hundred forty-five thousand, four hundred thirty-six".