1201804650 has 36 divisors (see below), whose sum is σ = 3228849702. Its totient is φ = 320481120.

The previous prime is 1201804609. The next prime is 1201804651. The reversal of 1201804650 is 564081021.

1201804650 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 8 + 0 + 4 + 650 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1084450761 + 117353889 = 32931^2 + 10833^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1201804651) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1334889 + ... + 1335788.

Almost surely, 2^1201804650 is an apocalyptic number.

1201804650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201804650 is an abundant number, since it is smaller than the sum of its proper divisors (2027045052).

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

1201804650 is a wasteful number, since it uses less digits than its factorization.

1201804650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670695 (or 2670687 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1201804650 is about 34667.0542446283. The cubic root of 1201804650 is about 1063.1910042517.

Adding to 1201804650 its reverse (564081021), we get a palindrome (1765885671).

The spelling of 1201804650 in words is "one billion, two hundred one million, eight hundred four thousand, six hundred fifty".