1205564955 has 16 divisors (see below), whose sum is σ = 2204461824. Its totient is φ = 551115360.

The previous prime is 1205564951. The next prime is 1205564959. The reversal of 1205564955 is 5594655021.

It is an interprime number because it is at equal distance from previous prime (1205564951) and next prime (1205564959).

It is not a de Polignac number, because 1205564955 - 2² = 1205564951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1205564951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5740681 + ... + 5740890.

It is an arithmetic number, because the mean of its divisors is an integer number (137778864).

Almost surely, 2^1205564955 is an apocalyptic number.

1205564955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1205564955 is a deficient number, since it is larger than the sum of its proper divisors (998896869).

1205564955 is a wasteful number, since it uses less digits than its factorization.

1205564955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11481586.

The product of its (nonzero) digits is 270000, while the sum is 42.

The square root of 1205564955 is about 34721.2464494004. The cubic root of 1205564955 is about 1064.2987161710.

The spelling of 1205564955 in words is "one billion, two hundred five million, five hundred sixty-four thousand, nine hundred fifty-five".