342121 has 4 divisors (see below), whose sum is σ = 368452. Its totient is φ = 315792.

The previous prime is 342107. The next prime is 342131. The reversal of 342121 is 121243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121243 = 263 ⋅461.

It can be written as a sum of positive squares in 2 ways, for example, as 129600 + 212521 = 360^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 342121 - 2⁷ = 341993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 26317 = 342121 / (3 + 4 + 2 + 1 + 2 + 1).

It is a Duffinian number.

342121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (342101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13146 + ... + 13171.

It is an arithmetic number, because the mean of its divisors is an integer number (92113).

2³⁴²¹²¹ is an apocalyptic number.

It is an amenable number.

342121 is a deficient number, since it is larger than the sum of its proper divisors (26331).

342121 is a wasteful number, since it uses less digits than its factorization.

342121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26330.

The product of its digits is 48, while the sum is 13.

The square root of 342121 is about 584.9111043569. The cubic root of 342121 is about 69.9401529295.

Adding to 342121 its reverse (121243), we get a palindrome (463364).

It can be divided in two parts, 3 and 42121, that added together give a palindrome (42124).

The spelling of 342121 in words is "three hundred forty-two thousand, one hundred twenty-one", and thus it is an iban number.