1212505444 has 48 divisors (see below), whose sum is σ = 2338560000. Its totient is φ = 547515936.

The previous prime is 1212505409. The next prime is 1212505447. The reversal of 1212505444 is 4445052121.

It is not an unprimeable number, because it can be changed into a prime (1212505447) 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 15 ways as a sum of consecutive naturals, for example, 605557 + ... + 607555.

It is an arithmetic number, because the mean of its divisors is an integer number (48720000).

Almost surely, 2^1212505444 is an apocalyptic number.

It is an amenable number.

1212505444 is a deficient number, since it is larger than the sum of its proper divisors (1126054556).

1212505444 is a wasteful number, since it uses less digits than its factorization.

1212505444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1212505444 is about 34821.0488641569. The cubic root of 1212505444 is about 1066.3372136629.

Adding to 1212505444 its reverse (4445052121), we get a palindrome (5657557565).

The spelling of 1212505444 in words is "one billion, two hundred twelve million, five hundred five thousand, four hundred forty-four".