1201205536 has 48 divisors (see below), whose sum is σ = 2550108960. Its totient is φ = 555102720.

The previous prime is 1201205527. The next prime is 1201205539. The reversal of 1201205536 is 6355021021.

It is a self number, because there is not a number n which added to its sum of digits gives 1201205536.

It is not an unprimeable number, because it can be changed into a prime (1201205539) 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 7 ways as a sum of consecutive naturals, for example, 835 + ... + 49021.

It is an arithmetic number, because the mean of its divisors is an integer number (53127270).

Almost surely, 2^1201205536 is an apocalyptic number.

1201205536 is a gapful number since it is divisible by the number (16) 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 1201205536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275054480).

1201205536 is an abundant number, since it is smaller than the sum of its proper divisors (1348903424).

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

1201205536 is a wasteful number, since it uses less digits than its factorization.

1201205536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48257 (or 48249 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1201205536 is about 34658.4121967525. The cubic root of 1201205536 is about 1063.0143037398.

Adding to 1201205536 its reverse (6355021021), we get a palindrome (7556226557).

The spelling of 1201205536 in words is "one billion, two hundred one million, two hundred five thousand, five hundred thirty-six".