5661345 has 16 divisors (see below), whose sum is σ = 9213120. Its totient is φ = 2967744.

The previous prime is 5661343. The next prime is 5661367. The reversal of 5661345 is 5431665.

It is not a de Polignac number, because 5661345 - 2¹ = 5661343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5661343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2314 + ... + 4083.

It is an arithmetic number, because the mean of its divisors is an integer number (575820).

Almost surely, 2^5661345 is an apocalyptic number.

It is an amenable number.

5661345 is a deficient number, since it is larger than the sum of its proper divisors (3551775).

5661345 is a wasteful number, since it uses less digits than its factorization.

5661345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6464.

The product of its digits is 10800, while the sum is 30.

The square root of 5661345 is about 2379.3581067170. The cubic root of 5661345 is about 178.2268810825.

It can be divided in two parts, 5661 and 345, that added together give a palindrome (6006).

The spelling of 5661345 in words is "five million, six hundred sixty-one thousand, three hundred forty-five".