1212489312 has 24 divisors (see below), whose sum is σ = 3182784696. Its totient is φ = 404163072.

The previous prime is 1212489307. The next prime is 1212489349. The reversal of 1212489312 is 2139842121.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 6314953 + ... + 6315144.

It is an arithmetic number, because the mean of its divisors is an integer number (132616029).

Almost surely, 2^1212489312 is an apocalyptic number.

1212489312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212489312 is an abundant number, since it is smaller than the sum of its proper divisors (1970295384).

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

1212489312 is a wasteful number, since it uses less digits than its factorization.

1212489312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12630110 (or 12630102 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 1212489312 is about 34820.8172218861. The cubic root of 1212489312 is about 1066.3324845492.

The spelling of 1212489312 in words is "one billion, two hundred twelve million, four hundred eighty-nine thousand, three hundred twelve".