4345 has 8 divisors (see below), whose sum is σ = 5760. Its totient is φ = 3120.

The previous prime is 4339. The next prime is 4349. The reversal of 4345 is 5434.

4345 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is not a de Polignac number, because 4345 - 2³ = 4337 is a prime.

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

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (4349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16 + ... + 94.

It is an arithmetic number, because the mean of its divisors is an integer number (720).

2⁴³⁴⁵ is an apocalyptic number.

It is an amenable number.

4345 is a deficient number, since it is larger than the sum of its proper divisors (1415).

4345 is a wasteful number, since it uses less digits than its factorization.

With its successor (4346) it forms an eRAP, since the sums of their prime factors are consecutive (95 and 96).

4345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95.

The product of its digits is 240, while the sum is 16.

The square root of 4345 is about 65.9166139907. The cubic root of 4345 is about 16.3178621607.

Adding to 4345 its reverse (5434), we get a palindrome (9779).

Subtracting 4345 from its reverse (5434), we obtain a square (1089 = 33²).

It can be divided in two parts, 43 and 45, that added together give a palindrome (88).

The spelling of 4345 in words is "four thousand, three hundred forty-five".