123410321 has 4 divisors (see below), whose sum is σ = 124196532. Its totient is φ = 122624112.

The previous prime is 123410317. The next prime is 123410323. The reversal of 123410321 is 123014321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123014321 = 313 ⋅393017.

It can be written as a sum of positive squares in 2 ways, for example, as 59985025 + 63425296 = 7745^2 + 7964^2 .

It is a cyclic number.

It is not a de Polignac number, because 123410321 - 2² = 123410317 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 123410321.

It is not an unprimeable number, because it can be changed into a prime (123410323) 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, 392870 + ... + 393183.

It is an arithmetic number, because the mean of its divisors is an integer number (31049133).

Almost surely, 2^123410321 is an apocalyptic number.

It is an amenable number.

123410321 is a deficient number, since it is larger than the sum of its proper divisors (786211).

123410321 is an equidigital number, since it uses as much as digits as its factorization.

123410321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786210.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123410321 is about 11109.0198037451. The cubic root of 123410321 is about 497.8713788034.

Adding to 123410321 its reverse (123014321), we get a palindrome (246424642).

The spelling of 123410321 in words is "one hundred twenty-three million, four hundred ten thousand, three hundred twenty-one".