120243420 has 192 divisors, whose sum is σ = 421908480. Its totient is φ = 28166400.

The previous prime is 120243407. The next prime is 120243427. The reversal of 120243420 is 24342021.

120243420 is a `hidden beast` number, since 1 + 2 + 0 + 243 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 120243393 and 120243402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120243427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 183814 + ... + 184466.

It is an arithmetic number, because the mean of its divisors is an integer number (2197440).

Almost surely, 2^120243420 is an apocalyptic number.

120243420 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 120243420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210954240).

120243420 is an abundant number, since it is smaller than the sum of its proper divisors (301665060).

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

120243420 is a wasteful number, since it uses less digits than its factorization.

120243420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 120243420 is about 10965.5560734511. The cubic root of 120243420 is about 493.5757036883.

Adding to 120243420 its reverse (24342021), we get a palindrome (144585441).

The spelling of 120243420 in words is "one hundred twenty million, two hundred forty-three thousand, four hundred twenty".