142103421 has 12 divisors (see below), whose sum is σ = 210808572. Its totient is φ = 92174976.

The previous prime is 142103359. The next prime is 142103443. The reversal of 142103421 is 124301241.

142103421 is a `hidden beast` number, since 142 + 103 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 101002500 + 41100921 = 10050^2 + 6411^2 .

It is not a de Polignac number, because 142103421 - 2¹¹ = 142101373 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142103394 and 142103403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142103471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213036 + ... + 213701.

It is an arithmetic number, because the mean of its divisors is an integer number (17567381).

Almost surely, 2^142103421 is an apocalyptic number.

It is an amenable number.

142103421 is a deficient number, since it is larger than the sum of its proper divisors (68705151).

142103421 is a wasteful number, since it uses less digits than its factorization.

142103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426780 (or 426777 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 142103421 is about 11920.7139467399. The cubic root of 142103421 is about 521.8369707118.

Adding to 142103421 its reverse (124301241), we get a palindrome (266404662).

The spelling of 142103421 in words is "one hundred forty-two million, one hundred three thousand, four hundred twenty-one".