123343420 has 24 divisors (see below), whose sum is σ = 267378048. Its totient is φ = 47745600.

The previous prime is 123343417. The next prime is 123343447. The reversal of 123343420 is 24343321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123343391 and 123343400.

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 in 7 ways as a sum of consecutive naturals, for example, 98851 + ... + 100090.

It is an arithmetic number, because the mean of its divisors is an integer number (11140752).

Almost surely, 2^123343420 is an apocalyptic number.

123343420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123343420 is an abundant number, since it is smaller than the sum of its proper divisors (144034628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123343420 is a wasteful number, since it uses less digits than its factorization.

123343420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198981 (or 198979 counting only the distinct ones).

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

The square root of 123343420 is about 11106.0082838075. The cubic root of 123343420 is about 497.7813968271.

Adding to 123343420 its reverse (24343321), we get a palindrome (147686741).

Subtracting from 123343420 its reverse (24343321), we obtain a palindrome (99000099).

The spelling of 123343420 in words is "one hundred twenty-three million, three hundred forty-three thousand, four hundred twenty".