142135420 has 48 divisors (see below), whose sum is σ = 342433728. Its totient is φ = 48545280.

The previous prime is 142135373. The next prime is 142135459. The reversal of 142135420 is 24531241.

It is a junction number, because it is equal to n+sod(n) for n = 142135391 and 142135400.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 37534 + ... + 41146.

It is an arithmetic number, because the mean of its divisors is an integer number (7134036).

Almost surely, 2^142135420 is an apocalyptic number.

142135420 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 142135420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171216864).

142135420 is an abundant number, since it is smaller than the sum of its proper divisors (200298308).

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

142135420 is a wasteful number, since it uses less digits than its factorization.

142135420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910 (or 3908 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 142135420 is about 11922.0560307356. The cubic root of 142135420 is about 521.8761370408.

Adding to 142135420 its reverse (24531241), we get a palindrome (166666661).

The spelling of 142135420 in words is "one hundred forty-two million, one hundred thirty-five thousand, four hundred twenty".