343042121 has 4 divisors (see below), whose sum is σ = 351409044. Its totient is φ = 334675200.

The previous prime is 343042103. The next prime is 343042127. The reversal of 343042121 is 121240343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121240343 = 7 ⋅17320049.

It can be written as a sum of positive squares in 2 ways, for example, as 116208400 + 226833721 = 10780^2 + 15061^2 .

It is a cyclic number.

It is not a de Polignac number, because 343042121 - 2⁶ = 343042057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343042093 and 343042102.

It is not an unprimeable number, because it can be changed into a prime (343042127) 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, 4183400 + ... + 4183481.

It is an arithmetic number, because the mean of its divisors is an integer number (87852261).

Almost surely, 2^343042121 is an apocalyptic number.

It is an amenable number.

343042121 is a deficient number, since it is larger than the sum of its proper divisors (8366923).

343042121 is an equidigital number, since it uses as much as digits as its factorization.

343042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8366922.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 343042121 is about 18521.3963026549. The cubic root of 343042121 is about 700.0286525687.

Adding to 343042121 its reverse (121240343), we get a palindrome (464282464).

The spelling of 343042121 in words is "three hundred forty-three million, forty-two thousand, one hundred twenty-one".