1142202120 has 256 divisors, whose sum is σ = 3849120000. Its totient is φ = 269746176.

The previous prime is 1142202109. The next prime is 1142202121. The reversal of 1142202120 is 212022411.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1142202120.

It is not an unprimeable number, because it can be changed into a prime (1142202121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2543656 + ... + 2544104.

It is an arithmetic number, because the mean of its divisors is an integer number (15035625).

Almost surely, 2^1142202120 is an apocalyptic number.

1142202120 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 1142202120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1924560000).

1142202120 is an abundant number, since it is smaller than the sum of its proper divisors (2706917880).

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

1142202120 is a wasteful number, since it uses less digits than its factorization.

1142202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1142202120 is about 33796.4808818906. The cubic root of 1142202120 is about 1045.3161349030.

Adding to 1142202120 its reverse (212022411), we get a palindrome (1354224531).

The spelling of 1142202120 in words is "one billion, one hundred forty-two million, two hundred two thousand, one hundred twenty".