142002120 has 128 divisors (see below), whose sum is σ = 461946240. Its totient is φ = 34713600.

The previous prime is 142002109. The next prime is 142002121. The reversal of 142002120 is 21200241.

142002120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 142002096 and 142002105.

It is not an unprimeable number, because it can be changed into a prime (142002121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 353920 + ... + 354320.

It is an arithmetic number, because the mean of its divisors is an integer number (3608955).

Almost surely, 2^142002120 is an apocalyptic number.

142002120 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 142002120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230973120).

142002120 is an abundant number, since it is smaller than the sum of its proper divisors (319944120).

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

142002120 is a wasteful number, since it uses less digits than its factorization.

142002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 142002120 is about 11916.4642407050. The cubic root of 142002120 is about 521.7129409197.

Adding to 142002120 its reverse (21200241), we get a palindrome (163202361).

The spelling of 142002120 in words is "one hundred forty-two million, two thousand, one hundred twenty".