243420120 has 128 divisors (see below), whose sum is σ = 815486400. Its totient is φ = 64585728.

The previous prime is 243420101. The next prime is 243420137. The reversal of 243420120 is 21024342.

243420120 is a `hidden beast` number, since 243 + 420 + 1 + 2 + 0 = 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 = 243420093 and 243420102.

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 31 ways as a sum of consecutive naturals, for example, 277122 + ... + 277998.

Almost surely, 2^243420120 is an apocalyptic number.

243420120 is a gapful number since it is divisible by the number (20) 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 243420120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407743200).

243420120 is an abundant number, since it is smaller than the sum of its proper divisors (572066280).

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

243420120 is a wasteful number, since it uses less digits than its factorization.

243420120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154 (or 1144 counting only the distinct ones).

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

The square root of 243420120 is about 15601.9268040842. The cubic root of 243420120 is about 624.3845632457.

Adding to 243420120 its reverse (21024342), we get a palindrome (264444462).

The spelling of 243420120 in words is "two hundred forty-three million, four hundred twenty thousand, one hundred twenty".