345343421 has 4 divisors (see below), whose sum is σ = 345815292. Its totient is φ = 344871552.

The previous prime is 345343403. The next prime is 345343433. The reversal of 345343421 is 124343543.

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 324504196 + 20839225 = 18014^2 + 4565^2 .

It is a cyclic number.

It is not a de Polignac number, because 345343421 - 2¹⁰ = 345342397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345343721) 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, 234836 + ... + 236301.

It is an arithmetic number, because the mean of its divisors is an integer number (86453823).

Almost surely, 2^345343421 is an apocalyptic number.

It is an amenable number.

345343421 is a deficient number, since it is larger than the sum of its proper divisors (471871).

345343421 is an equidigital number, since it uses as much as digits as its factorization.

345343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471870.

The product of its digits is 17280, while the sum is 29.

The square root of 345343421 is about 18583.4179041424. The cubic root of 345343421 is about 701.5905471508.

Adding to 345343421 its reverse (124343543), we get a palindrome (469686964).

The spelling of 345343421 in words is "three hundred forty-five million, three hundred forty-three thousand, four hundred twenty-one".