1204211620 has 48 divisors (see below), whose sum is σ = 2620357488. Its totient is φ = 464486400.

The previous prime is 1204211611. The next prime is 1204211639. The reversal of 1204211620 is 261124021.

It can be written as a sum of positive squares in 8 ways, for example, as 54730404 + 1149481216 = 7398^2 + 33904^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76420 + ... + 90820.

It is an arithmetic number, because the mean of its divisors is an integer number (54590781).

Almost surely, 2^1204211620 is an apocalyptic number.

1204211620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1204211620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1310178744).

1204211620 is an abundant number, since it is smaller than the sum of its proper divisors (1416145868).

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

1204211620 is a wasteful number, since it uses less digits than its factorization.

1204211620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14560 (or 14558 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1204211620 is about 34701.7524053181. The cubic root of 1204211620 is about 1063.9003159574.

Adding to 1204211620 its reverse (261124021), we get a palindrome (1465335641).

The spelling of 1204211620 in words is "one billion, two hundred four million, two hundred eleven thousand, six hundred twenty".