1200505005 has 24 divisors (see below), whose sum is σ = 2378143872. Its totient is φ = 548802144.

The previous prime is 1200504971. The next prime is 1200505013. The reversal of 1200505005 is 5005050021.

It is not a de Polignac number, because 1200505005 - 2¹² = 1200500909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1905249 + ... + 1905878.

It is an arithmetic number, because the mean of its divisors is an integer number (99089328).

Almost surely, 2^1200505005 is an apocalyptic number.

1200505005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1200505005 is a deficient number, since it is larger than the sum of its proper divisors (1177638867).

1200505005 is a wasteful number, since it uses less digits than its factorization.

1200505005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811145 (or 3811142 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 1200505005 is about 34648.3045039725. The cubic root of 1200505005 is about 1062.8076171348.

Adding to 1200505005 its reverse (5005050021), we get a palindrome (6205555026).

The spelling of 1200505005 in words is "one billion, two hundred million, five hundred five thousand, five".