1245220112 has 20 divisors (see below), whose sum is σ = 2436504396. Its totient is φ = 616444800.

The previous prime is 1245220103. The next prime is 1245220133. The reversal of 1245220112 is 2110225421.

It can be written as a sum of positive squares in 2 ways, for example, as 745071616 + 500148496 = 27296^2 + 22364^2 .

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, 383663 + ... + 386894.

Almost surely, 2^1245220112 is an apocalyptic number.

It is an amenable number.

1245220112 is a deficient number, since it is larger than the sum of its proper divisors (1191284284).

1245220112 is a wasteful number, since it uses less digits than its factorization.

1245220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770666 (or 770660 counting only the distinct ones).

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

The square root of 1245220112 is about 35287.6764891088. The cubic root of 1245220112 is about 1075.8425302650.

Adding to 1245220112 its reverse (2110225421), we get a palindrome (3355445533).

The spelling of 1245220112 in words is "one billion, two hundred forty-five million, two hundred twenty thousand, one hundred twelve".