123120425440 has 96 divisors (see below), whose sum is σ = 297757845504. Its totient is φ = 48087237120.

The previous prime is 123120425411. The next prime is 123120425443. The reversal of 123120425440 is 44524021321.

It is a junction number, because it is equal to n+sod(n) for n = 123120425399 and 123120425408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120425443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3222127 + ... + 3260113.

It is an arithmetic number, because the mean of its divisors is an integer number (3101644224).

Almost surely, 2^123120425440 is an apocalyptic number.

123120425440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123120425440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148878922752).

123120425440 is an abundant number, since it is smaller than the sum of its proper divisors (174637420064).

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

123120425440 is a wasteful number, since it uses less digits than its factorization.

123120425440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38480 (or 38472 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 123120425440 its reverse (44524021321), we get a palindrome (167644446761).

The spelling of 123120425440 in words is "one hundred twenty-three billion, one hundred twenty million, four hundred twenty-five thousand, four hundred forty".