1204851920 has 20 divisors (see below), whose sum is σ = 2801280900. Its totient is φ = 481940736.

The previous prime is 1204851911. The next prime is 1204851929. The reversal of 1204851920 is 291584021.

It is an interprime number because it is at equal distance from previous prime (1204851911) and next prime (1204851929).

It can be written as a sum of positive squares in 2 ways, for example, as 881139856 + 323712064 = 29684^2 + 17992^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204851929) 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 3 ways as a sum of consecutive naturals, for example, 7530245 + ... + 7530404.

It is an arithmetic number, because the mean of its divisors is an integer number (140064045).

Almost surely, 2^1204851920 is an apocalyptic number.

1204851920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1204851920 is an abundant number, since it is smaller than the sum of its proper divisors (1596428980).

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

1204851920 is a wasteful number, since it uses less digits than its factorization.

1204851920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15060662 (or 15060656 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1204851920 is about 34710.9769381387. The cubic root of 1204851920 is about 1064.0888472362.

The spelling of 1204851920 in words is "one billion, two hundred four million, eight hundred fifty-one thousand, nine hundred twenty".