142142020 has 24 divisors (see below), whose sum is σ = 298882584. Its totient is φ = 56783616.

The previous prime is 142142003. The next prime is 142142029. The reversal of 142142020 is 20241241.

It can be written as a sum of positive squares in 4 ways, for example, as 24462916 + 117679104 = 4946^2 + 10848^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142141985 and 142142003.

It is not an unprimeable number, because it can be changed into a prime (142142029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12994 + ... + 21286.

It is an arithmetic number, because the mean of its divisors is an integer number (12453441).

Almost surely, 2^142142020 is an apocalyptic number.

142142020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142142020 is an abundant number, since it is smaller than the sum of its proper divisors (156740564).

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

142142020 is a wasteful number, since it uses less digits than its factorization.

142142020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9159 (or 9157 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 142142020 is about 11922.3328254163. The cubic root of 142142020 is about 521.8842146173.

Adding to 142142020 its reverse (20241241), we get a palindrome (162383261).

The spelling of 142142020 in words is "one hundred forty-two million, one hundred forty-two thousand, twenty".