1230123005 has 4 divisors (see below), whose sum is σ = 1476147612. Its totient is φ = 984098400.

The previous prime is 1230122989. The next prime is 1230123019. The reversal of 1230123005 is 5003210321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130736356 + 1099386649 = 11434^2 + 33157^2 .

It is not a de Polignac number, because 1230123005 - 2⁴ = 1230122989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123012296 + ... + 123012305.

It is an arithmetic number, because the mean of its divisors is an integer number (369036903).

Almost surely, 2^1230123005 is an apocalyptic number.

It is an amenable number.

1230123005 is a deficient number, since it is larger than the sum of its proper divisors (246024607).

1230123005 is an equidigital number, since it uses as much as digits as its factorization.

1230123005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246024606.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1230123005 is about 35073.1094287347. The cubic root of 1230123005 is about 1071.4769846611.

Adding to 1230123005 its reverse (5003210321), we get a palindrome (6233333326).

The spelling of 1230123005 in words is "one billion, two hundred thirty million, one hundred twenty-three thousand, five".