1245221012 has 96 divisors (see below), whose sum is σ = 2757888000. Its totient is φ = 479647872.

The previous prime is 1245221009. The next prime is 1245221027. The reversal of 1245221012 is 2101225421.

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 31 ways as a sum of consecutive naturals, for example, 1822823 + ... + 1823505.

It is an arithmetic number, because the mean of its divisors is an integer number (28728000).

Almost surely, 2^1245221012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245221012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378944000).

1245221012 is an abundant number, since it is smaller than the sum of its proper divisors (1512666988).

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

1245221012 is a wasteful number, since it uses less digits than its factorization.

1245221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1245221012 is about 35287.6892414338. The cubic root of 1245221012 is about 1075.8427894582.

Adding to 1245221012 its reverse (2101225421), we get a palindrome (3346446433).

The spelling of 1245221012 in words is "one billion, two hundred forty-five million, two hundred twenty-one thousand, twelve".