5645391 has 8 divisors (see below), whose sum is σ = 7538304. Its totient is φ = 3758040.

The previous prime is 5645383. The next prime is 5645407. The reversal of 5645391 is 1935465.

It is a happy number.

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

It is not a de Polignac number, because 5645391 - 2³ = 5645383 is a prime.

5645391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645191) 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 7 ways as a sum of consecutive naturals, for example, 2710 + ... + 4316.

It is an arithmetic number, because the mean of its divisors is an integer number (942288).

Almost surely, 2^5645391 is an apocalyptic number.

5645391 is a deficient number, since it is larger than the sum of its proper divisors (1892913).

5645391 is a wasteful number, since it uses less digits than its factorization.

5645391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781.

The product of its digits is 16200, while the sum is 33.

The square root of 5645391 is about 2376.0031565636. The cubic root of 5645391 is about 178.0593056603.

The spelling of 5645391 in words is "five million, six hundred forty-five thousand, three hundred ninety-one".