342140321 has 4 divisors (see below), whose sum is σ = 342400644. Its totient is φ = 341880000.

The previous prime is 342140291. The next prime is 342140327. The reversal of 342140321 is 123041243.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 304991296 + 37149025 = 17464^2 + 6095^2 .

It is a cyclic number.

It is not a de Polignac number, because 342140321 - 2²² = 337946017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 342140293 and 342140302.

It is not an unprimeable number, because it can be changed into a prime (342140327) 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, 128180 + ... + 130821.

It is an arithmetic number, because the mean of its divisors is an integer number (85600161).

Almost surely, 2^342140321 is an apocalyptic number.

It is an amenable number.

342140321 is a deficient number, since it is larger than the sum of its proper divisors (260323).

342140321 is a wasteful number, since it uses less digits than its factorization.

342140321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260322.

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

The square root of 342140321 is about 18497.0354651766. The cubic root of 342140321 is about 699.4146950875.

Adding to 342140321 its reverse (123041243), we get a palindrome (465181564).

The spelling of 342140321 in words is "three hundred forty-two million, one hundred forty thousand, three hundred twenty-one".