1243302120 has 192 divisors, whose sum is σ = 4285232640. Its totient is φ = 312076800.

The previous prime is 1243302119. The next prime is 1243302131. The reversal of 1243302120 is 212033421.

1243302120 is a `hidden beast` number, since 1 + 243 + 302 + 120 = 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 = 1243302093 and 1243302102.

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 47 ways as a sum of consecutive naturals, for example, 411415 + ... + 414425.

It is an arithmetic number, because the mean of its divisors is an integer number (22318920).

Almost surely, 2^1243302120 is an apocalyptic number.

1243302120 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 1243302120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2142616320).

1243302120 is an abundant number, since it is smaller than the sum of its proper divisors (3041930520).

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

1243302120 is a wasteful number, since it uses less digits than its factorization.

1243302120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096 (or 3089 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1243302120 is about 35260.4895031252. The cubic root of 1243302120 is about 1075.2898789197.

Adding to 1243302120 its reverse (212033421), we get a palindrome (1455335541).

The spelling of 1243302120 in words is "one billion, two hundred forty-three million, three hundred two thousand, one hundred twenty".