142422021 has 24 divisors (see below), whose sum is σ = 236917824. Its totient is φ = 80758080.

The previous prime is 142422013. The next prime is 142422031. The reversal of 142422021 is 120224241.

142422021 is a `hidden beast` number, since 1 + 424 + 220 + 21 = 666.

It is not a de Polignac number, because 142422021 - 2³ = 142422013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142421985 and 142422003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142422011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 376 + ... + 16881.

It is an arithmetic number, because the mean of its divisors is an integer number (9871576).

Almost surely, 2^142422021 is an apocalyptic number.

It is an amenable number.

142422021 is a deficient number, since it is larger than the sum of its proper divisors (94495803).

142422021 is a wasteful number, since it uses less digits than its factorization.

142422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17401 (or 17398 counting only the distinct ones).

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

The square root of 142422021 is about 11934.0697584688. The cubic root of 142422021 is about 522.2266708355.

Adding to 142422021 its reverse (120224241), we get a palindrome (262646262).

It can be divided in two parts, 1424220 and 21, that added together give a palindrome (1424241).

The spelling of 142422021 in words is "one hundred forty-two million, four hundred twenty-two thousand, twenty-one".