142421121 has 24 divisors (see below), whose sum is σ = 220596480. Its totient is φ = 88223616.

The previous prime is 142421113. The next prime is 142421143. The reversal of 142421121 is 121124241.

It is not a de Polignac number, because 142421121 - 2³ = 142421113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142421094 and 142421103.

It is not an unprimeable number, because it can be changed into a prime (142421021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6196 + ... + 17978.

It is an arithmetic number, because the mean of its divisors is an integer number (9191520).

Almost surely, 2^142421121 is an apocalyptic number.

It is an amenable number.

142421121 is a deficient number, since it is larger than the sum of its proper divisors (78175359).

142421121 is a wasteful number, since it uses less digits than its factorization.

142421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11885 (or 11882 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 142421121 is about 11934.0320512390. The cubic root of 142421121 is about 522.2255708066.

Adding to 142421121 its reverse (121124241), we get a palindrome (263545362).

The spelling of 142421121 in words is "one hundred forty-two million, four hundred twenty-one thousand, one hundred twenty-one".