1200255505 has 8 divisors (see below), whose sum is σ = 1525030632. Its totient is φ = 903721728.

The previous prime is 1200255503. The next prime is 1200255533. The reversal of 1200255505 is 5055520021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 315133504 + 885122001 = 17752^2 + 29751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200255505 - 2¹ = 1200255503 is a prime.

It is a super-2 number, since 2×1200255505² = 2881226554565610050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200255505.

It is not an unprimeable number, because it can be changed into a prime (1200255503) 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, 7060242 + ... + 7060411.

It is an arithmetic number, because the mean of its divisors is an integer number (190628829).

Almost surely, 2^1200255505 is an apocalyptic number.

It is an amenable number.

1200255505 is a deficient number, since it is larger than the sum of its proper divisors (324775127).

1200255505 is a wasteful number, since it uses less digits than its factorization.

1200255505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14120675.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 1200255505 is about 34644.7038521041. The cubic root of 1200255505 is about 1062.7339845464.

Adding to 1200255505 its reverse (5055520021), we get a palindrome (6255775526).

The spelling of 1200255505 in words is "one billion, two hundred million, two hundred fifty-five thousand, five hundred five".