142212420 has 144 divisors (see below), whose sum is σ = 501621120. Its totient is φ = 31938048.

The previous prime is 142212419. The next prime is 142212443. The reversal of 142212420 is 24212241.

142212420 is a `hidden beast` number, since 1 + 422 + 1 + 242 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 142212393 and 142212402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73384 + ... + 75296.

It is an arithmetic number, because the mean of its divisors is an integer number (3483480).

Almost surely, 2^142212420 is an apocalyptic number.

142212420 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 142212420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250810560).

142212420 is an abundant number, since it is smaller than the sum of its proper divisors (359408700).

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

142212420 is a wasteful number, since it uses less digits than its factorization.

142212420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 142212420 is about 11925.2849022571. The cubic root of 142212420 is about 521.9703598795.

Adding to 142212420 its reverse (24212241), we get a palindrome (166424661).

It can be divided in two parts, 14221 and 2420, that added together give a square (16641 = 129²).

The spelling of 142212420 in words is "one hundred forty-two million, two hundred twelve thousand, four hundred twenty".