123316420 has 24 divisors (see below), whose sum is σ = 262088064. Its totient is φ = 48731616.

The previous prime is 123316399. The next prime is 123316429. The reversal of 123316420 is 24613321.

It is a junction number, because it is equal to n+sod(n) for n = 123316391 and 123316400.

It is not an unprimeable number, because it can be changed into a prime (123316429) 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 7 ways as a sum of consecutive naturals, for example, 35484 + ... + 38803.

It is an arithmetic number, because the mean of its divisors is an integer number (10920336).

Almost surely, 2^123316420 is an apocalyptic number.

123316420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123316420 is an abundant number, since it is smaller than the sum of its proper divisors (138771644).

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

123316420 is a wasteful number, since it uses less digits than its factorization.

123316420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74379 (or 74377 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 123316420 is about 11104.7926590279. The cubic root of 123316420 is about 497.7450725586.

Adding to 123316420 its reverse (24613321), we get a palindrome (147929741).

The spelling of 123316420 in words is "one hundred twenty-three million, three hundred sixteen thousand, four hundred twenty".