142421 has 2 divisors, whose sum is σ = 142422. Its totient is φ = 142420.

The previous prime is 142403. The next prime is 142427. The reversal of 142421 is 124241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130321 + 12100 = 361^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 142421 - 2⁶ = 142357 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142396 and 142405.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142421.

It is not a weakly prime, because it can be changed into another prime (142427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71210 + 71211.

It is an arithmetic number, because the mean of its divisors is an integer number (71211).

2¹⁴²⁴²¹ is an apocalyptic number.

It is an amenable number.

142421 is a deficient number, since it is larger than the sum of its proper divisors (1).

142421 is an equidigital number, since it uses as much as digits as its factorization.

142421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 14.

The square root of 142421 is about 377.3870692008. The cubic root of 142421 is about 52.2225422914. Note that the first 3 decimals are identical.

Adding to 142421 its reverse (124241), we get a palindrome (266662).

The spelling of 142421 in words is "one hundred forty-two thousand, four hundred twenty-one", and thus it is an iban number.