345056405 has 4 divisors (see below), whose sum is σ = 414067692. Its totient is φ = 276045120.

The previous prime is 345056399. The next prime is 345056417. The reversal of 345056405 is 504650543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504650543 = 18679 ⋅27017.

It can be written as a sum of positive squares in 2 ways, for example, as 186950929 + 158105476 = 13673^2 + 12574^2 .

It is not a de Polignac number, because 345056405 - 2⁴ = 345056389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34505636 + ... + 34505645.

It is an arithmetic number, because the mean of its divisors is an integer number (103516923).

Almost surely, 2^345056405 is an apocalyptic number.

It is an amenable number.

345056405 is a deficient number, since it is larger than the sum of its proper divisors (69011287).

345056405 is an equidigital number, since it uses as much as digits as its factorization.

345056405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69011286.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 345056405 is about 18575.6939305104. The cubic root of 345056405 is about 701.3961285790.

The spelling of 345056405 in words is "three hundred forty-five million, fifty-six thousand, four hundred five".