1231300005 has 64 divisors (see below), whose sum is σ = 2200117248. Its totient is φ = 583937280.

The previous prime is 1231300003. The next prime is 1231300019. The reversal of 1231300005 is 5000031321.

It is a happy number.

It is not a de Polignac number, because 1231300005 - 2¹ = 1231300003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231300003) 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 63 ways as a sum of consecutive naturals, for example, 2097322 + ... + 2097908.

It is an arithmetic number, because the mean of its divisors is an integer number (34376832).

Almost surely, 2^1231300005 is an apocalyptic number.

1231300005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231300005 is a deficient number, since it is larger than the sum of its proper divisors (968817243).

1231300005 is a wasteful number, since it uses less digits than its factorization.

1231300005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1231300005 is about 35089.8846535579. The cubic root of 1231300005 is about 1071.8186107687.

Adding to 1231300005 its reverse (5000031321), we get a palindrome (6231331326).

The spelling of 1231300005 in words is "one billion, two hundred thirty-one million, three hundred thousand, five".