345671 has 4 divisors (see below), whose sum is σ = 354144. Its totient is φ = 337200.

The previous prime is 345659. The next prime is 345673. The reversal of 345671 is 176543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176543 = 53 ⋅3331.

It is a cyclic number.

It is not a de Polignac number, because 345671 - 2⁶ = 345607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 345671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4175 + ... + 4256.

It is an arithmetic number, because the mean of its divisors is an integer number (88536).

2³⁴⁵⁶⁷¹ is an apocalyptic number.

345671 is a deficient number, since it is larger than the sum of its proper divisors (8473).

345671 is an equidigital number, since it uses as much as digits as its factorization.

345671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8472.

The product of its digits is 2520, while the sum is 26.

The square root of 345671 is about 587.9379218931. The cubic root of 345671 is about 70.1812310654.

The spelling of 345671 in words is "three hundred forty-five thousand, six hundred seventy-one".