5649945 has 24 divisors (see below), whose sum is σ = 10517184. Its totient is φ = 2582496.

The previous prime is 5649913. The next prime is 5649949. The reversal of 5649945 is 5499465.

It is a happy number.

It is not a de Polignac number, because 5649945 - 2⁵ = 5649913 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5649897 and 5649906.

It is not an unprimeable number, because it can be changed into a prime (5649949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3109 + ... + 4578.

It is an arithmetic number, because the mean of its divisors is an integer number (438216).

Almost surely, 2^5649945 is an apocalyptic number.

It is an amenable number.

5649945 is a deficient number, since it is larger than the sum of its proper divisors (4867239).

5649945 is a wasteful number, since it uses less digits than its factorization.

5649945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7709 (or 7702 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 5649945 is about 2376.9612954358. The cubic root of 5649945 is about 178.1071714997.

Subtracting from 5649945 its product of digits (194400), we obtain a palindrome (5455545).

The spelling of 5649945 in words is "five million, six hundred forty-nine thousand, nine hundred forty-five".