1230005145 has 16 divisors (see below), whose sum is σ = 1971142272. Its totient is φ = 654958080.

The previous prime is 1230005129. The next prime is 1230005149. The reversal of 1230005145 is 5415000321.

It is not a de Polignac number, because 1230005145 - 2⁴ = 1230005129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1230005149) 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 15 ways as a sum of consecutive naturals, for example, 55512 + ... + 74441.

It is an arithmetic number, because the mean of its divisors is an integer number (123196392).

Almost surely, 2^1230005145 is an apocalyptic number.

1230005145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1230005145 is a deficient number, since it is larger than the sum of its proper divisors (741137127).

1230005145 is a wasteful number, since it uses less digits than its factorization.

1230005145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130592.

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

The square root of 1230005145 is about 35071.4291838813. The cubic root of 1230005145 is about 1071.4427636088.

Adding to 1230005145 its reverse (5415000321), we get a palindrome (6645005466).

The spelling of 1230005145 in words is "one billion, two hundred thirty million, five thousand, one hundred forty-five".