3445 has 8 divisors (see below), whose sum is σ = 4536. Its totient is φ = 2496.

The previous prime is 3433. The next prime is 3449. The reversal of 3445 is 5443.

3445 = 41² + 42².

3445 is nontrivially palindromic in base 12.

3445 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 196 + 3249 = 14^2 + 57^2 .

It is a sliding number, since 3445 = 320 + 3125 and 1/320 + 1/3125 = 0.003445.

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

It is not a de Polignac number, because 3445 - 2⁵ = 3413 is a prime.

It is a Duffinian number.

3445 is an undulating number in base 8.

It is a plaindrome in base 10.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39 + ... + 91.

It is an arithmetic number, because the mean of its divisors is an integer number (567).

2³⁴⁴⁵ is an apocalyptic number.

3445 is the 42-nd centered square number.

It is an amenable number.

3445 is a deficient number, since it is larger than the sum of its proper divisors (1091).

3445 is a wasteful number, since it uses less digits than its factorization.

3445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71.

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

The square root of 3445 is about 58.6941223633. The cubic root of 3445 is about 15.1029948886.

Adding to 3445 its reverse (5443), we get a palindrome (8888).

The spelling of 3445 in words is "three thousand, four hundred forty-five".