342421 has 2 divisors, whose sum is σ = 342422. Its totient is φ = 342420.

The previous prime is 342413. The next prime is 342449. The reversal of 342421 is 124243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342225 + 196 = 585^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 342421 - 2³ = 342413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 342395 and 342404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171210 + 171211.

It is an arithmetic number, because the mean of its divisors is an integer number (171211).

2³⁴²⁴²¹ is an apocalyptic number.

It is an amenable number.

342421 is a deficient number, since it is larger than the sum of its proper divisors (1).

342421 is an equidigital number, since it uses as much as digits as its factorization.

342421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 16.

The square root of 342421 is about 585.1674973886. The cubic root of 342421 is about 69.9605900613.

Adding to 342421 its reverse (124243), we get a palindrome (466664).

It can be divided in two parts, 34242 and 1, that added together give a palindrome (34243).

The spelling of 342421 in words is "three hundred forty-two thousand, four hundred twenty-one", and thus it is an iban number.