1231004505 has 32 divisors (see below), whose sum is σ = 2074512384. Its totient is φ = 622102976.

The previous prime is 1231004503. The next prime is 1231004531. The reversal of 1231004505 is 5054001321.

It is a cyclic number.

It is not a de Polignac number, because 1231004505 - 2¹ = 1231004503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231004503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20242 + ... + 53588.

It is an arithmetic number, because the mean of its divisors is an integer number (64828512).

Almost surely, 2^1231004505 is an apocalyptic number.

1231004505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231004505 is a deficient number, since it is larger than the sum of its proper divisors (843507879).

1231004505 is a wasteful number, since it uses less digits than its factorization.

1231004505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33485.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1231004505 is about 35085.6737857491. The cubic root of 1231004505 is about 1071.7328619021.

Adding to 1231004505 its reverse (5054001321), we get a palindrome (6285005826).

The spelling of 1231004505 in words is "one billion, two hundred thirty-one million, four thousand, five hundred five".