142421122 has 4 divisors (see below), whose sum is σ = 213631686. Its totient is φ = 71210560.

The previous prime is 142421113. The next prime is 142421143. The reversal of 142421122 is 221124241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221124241 = 13 ⋅17009557.

It can be written as a sum of positive squares in only one way, i.e., 142348761 + 72361 = 11931^2 + 269^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 142421122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35605279 + ... + 35605282.

Almost surely, 2^142421122 is an apocalyptic number.

142421122 is a deficient number, since it is larger than the sum of its proper divisors (71210564).

142421122 is an equidigital number, since it uses as much as digits as its factorization.

142421122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71210563.

The product of its digits is 256, while the sum is 19.

The square root of 142421122 is about 11934.0320931360. The cubic root of 142421122 is about 522.2255720289.

Adding to 142421122 its reverse (221124241), we get a palindrome (363545363).

It can be divided in two parts, 14 and 2421122, that added together give a square (2421136 = 1556²).

The spelling of 142421122 in words is "one hundred forty-two million, four hundred twenty-one thousand, one hundred twenty-two".