123143321 has 12 divisors (see below), whose sum is σ = 143986788. Its totient is φ = 105007392.

The previous prime is 123143299. The next prime is 123143329. The reversal of 123143321 is 123341321.

It can be written as a sum of positive squares in 2 ways, for example, as 102313225 + 20830096 = 10115^2 + 4564^2 .

It is not a de Polignac number, because 123143321 - 2²⁶ = 56034457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123143293 and 123143302.

It is not an unprimeable number, because it can be changed into a prime (123143329) 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 11 ways as a sum of consecutive naturals, for example, 3275 + ... + 16031.

It is an arithmetic number, because the mean of its divisors is an integer number (11998899).

Almost surely, 2^123143321 is an apocalyptic number.

It is an amenable number.

123143321 is a deficient number, since it is larger than the sum of its proper divisors (20843467).

123143321 is a wasteful number, since it uses less digits than its factorization.

123143321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12968 (or 12961 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 123143321 is about 11096.9960349637. The cubic root of 123143321 is about 497.5120689311.

Adding to 123143321 its reverse (123341321), we get a palindrome (246484642).

The spelling of 123143321 in words is "one hundred twenty-three million, one hundred forty-three thousand, three hundred twenty-one".