1230153123 has 4 divisors (see below), whose sum is σ = 1640204168. Its totient is φ = 820102080.

The previous prime is 1230153121. The next prime is 1230153131. The reversal of 1230153123 is 3213510321.

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

It is not a de Polignac number, because 1230153123 - 2¹ = 1230153121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230153123.

It is not an unprimeable number, because it can be changed into a prime (1230153121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205025518 + ... + 205025523.

It is an arithmetic number, because the mean of its divisors is an integer number (410051042).

Almost surely, 2^1230153123 is an apocalyptic number.

1230153123 is a deficient number, since it is larger than the sum of its proper divisors (410051045).

1230153123 is an equidigital number, since it uses as much as digits as its factorization.

1230153123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410051044.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1230153123 is about 35073.5387863842. The cubic root of 1230153123 is about 1071.4857291742.

Adding to 1230153123 its reverse (3213510321), we get a palindrome (4443663444).

The spelling of 1230153123 in words is "one billion, two hundred thirty million, one hundred fifty-three thousand, one hundred twenty-three".