345866 has 4 divisors (see below), whose sum is σ = 518802. Its totient is φ = 172932.

The previous prime is 345853. The next prime is 345869. The reversal of 345866 is 668543.

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., 297025 + 48841 = 545^2 + 221^2 .

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345866.

It is not an unprimeable number, because it can be changed into a prime (345869) by changing a digit.

345866 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 as a sum of consecutive naturals, namely, 86465 + ... + 86468.

2³⁴⁵⁸⁶⁶ is an apocalyptic number.

345866 is a deficient number, since it is larger than the sum of its proper divisors (172936).

345866 is a wasteful number, since it uses less digits than its factorization.

345866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172935.

The product of its digits is 17280, while the sum is 32.

The square root of 345866 is about 588.1037323466. The cubic root of 345866 is about 70.1944254684.

The spelling of 345866 in words is "three hundred forty-five thousand, eight hundred sixty-six".