142111020 has 192 divisors, whose sum is σ = 444165120. Its totient is φ = 33825792.

The previous prime is 142111019. The next prime is 142111063. The reversal of 142111020 is 20111241.

It is a happy number.

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 = 142110987 and 142111005.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2121027 + ... + 2121093.

It is an arithmetic number, because the mean of its divisors is an integer number (2313360).

Almost surely, 2^142111020 is an apocalyptic number.

142111020 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 142111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222082560).

142111020 is an abundant number, since it is smaller than the sum of its proper divisors (302054100).

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

142111020 is a wasteful number, since it uses less digits than its factorization.

142111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 142111020 is about 11921.0326733887. The cubic root of 142111020 is about 521.8462723140.

Adding to 142111020 its reverse (20111241), we get a palindrome (162222261).

The spelling of 142111020 in words is "one hundred forty-two million, one hundred eleven thousand, twenty".