345218 has 8 divisors (see below), whose sum is σ = 523260. Its totient is φ = 170800.

The previous prime is 345193. The next prime is 345221. The reversal of 345218 is 812543.

It can be written as a sum of positive squares in 2 ways, for example, as 339889 + 5329 = 583^2 + 73^2 .

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

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 345193 and 345202.

It is an unprimeable number.

345218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653 + ... + 1056.

2³⁴⁵²¹⁸ is an apocalyptic number.

345218 is a deficient number, since it is larger than the sum of its proper divisors (178042).

345218 is a wasteful number, since it uses less digits than its factorization.

345218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812.

The product of its digits is 960, while the sum is 23.

The square root of 345218 is about 587.5525508412. The cubic root of 345218 is about 70.1505602873.

The spelling of 345218 in words is "three hundred forty-five thousand, two hundred eighteen".