123340342 has 4 divisors (see below), whose sum is σ = 185010516. Its totient is φ = 61670170.

The previous prime is 123340339. The next prime is 123340379. The reversal of 123340342 is 243043321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243043321 = 7933 ⋅30637.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30835084 + ... + 30835087.

It is an arithmetic number, because the mean of its divisors is an integer number (46252629).

Almost surely, 2^123340342 is an apocalyptic number.

123340342 is a deficient number, since it is larger than the sum of its proper divisors (61670174).

123340342 is an equidigital number, since it uses as much as digits as its factorization.

123340342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61670173.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 123340342 is about 11105.8697093024. The cubic root of 123340342 is about 497.7772561283. Note that the first 3 decimals are identical.

Adding to 123340342 its reverse (243043321), we get a palindrome (366383663).

The spelling of 123340342 in words is "one hundred twenty-three million, three hundred forty thousand, three hundred forty-two".