345221705 has 8 divisors (see below), whose sum is σ = 419510400. Its totient is φ = 272681136.

The previous prime is 345221699. The next prime is 345221717. The reversal of 345221705 is 507122543.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345221705 - 2²⁶ = 278112841 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436595 + ... + 437384.

It is an arithmetic number, because the mean of its divisors is an integer number (52438800).

Almost surely, 2^345221705 is an apocalyptic number.

It is an amenable number.

345221705 is a deficient number, since it is larger than the sum of its proper divisors (74288695).

345221705 is an equidigital number, since it uses as much as digits as its factorization.

345221705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874063.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 345221705 is about 18580.1427604849. The cubic root of 345221705 is about 701.5081124648.

The spelling of 345221705 in words is "three hundred forty-five million, two hundred twenty-one thousand, seven hundred five".