1205220564 has 36 divisors (see below), whose sum is σ = 3048165120. Its totient is φ = 401524560.

The previous prime is 1205220563. The next prime is 1205220581. The reversal of 1205220564 is 4650225021.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205220563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68067 + ... + 83925.

Almost surely, 2^1205220564 is an apocalyptic number.

It is an amenable number.

1205220564 is an abundant number, since it is smaller than the sum of its proper divisors (1842944556).

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

1205220564 is a wasteful number, since it uses less digits than its factorization.

1205220564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17980 (or 17975 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1205220564 is about 34716.2867253973. The cubic root of 1205220564 is about 1064.1973612542.

Adding to 1205220564 its reverse (4650225021), we get a palindrome (5855445585).

The spelling of 1205220564 in words is "one billion, two hundred five million, two hundred twenty thousand, five hundred sixty-four".