345658 has 4 divisors (see below), whose sum is σ = 518490. Its totient is φ = 172828.

The previous prime is 345647. The next prime is 345659. The reversal of 345658 is 856543.

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

It can be written as a sum of positive squares in only one way, i.e., 344569 + 1089 = 587^2 + 33^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is not an unprimeable number, because it can be changed into a prime (345659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86413 + ... + 86416.

2³⁴⁵⁶⁵⁸ is an apocalyptic number.

345658 is a deficient number, since it is larger than the sum of its proper divisors (172832).

345658 is a wasteful number, since it uses less digits than its factorization.

345658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172831.

The product of its digits is 14400, while the sum is 31.

The square root of 345658 is about 587.9268662002. The cubic root of 345658 is about 70.1803512621.

The spelling of 345658 in words is "three hundred forty-five thousand, six hundred fifty-eight".