5645131 has 4 divisors (see below), whose sum is σ = 5827264. Its totient is φ = 5463000.

The previous prime is 5645119. The next prime is 5645137. The reversal of 5645131 is 1315465.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5645131 - 2⁵ = 5645099 is a prime.

It is a super-2 number, since 2×5645131² = 63735008014322, which contains 22 as substring.

It is a Duffinian number.

5645131 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5645096 and 5645105.

It is not an unprimeable number, because it can be changed into a prime (5645137) 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 3 ways as a sum of consecutive naturals, for example, 91020 + ... + 91081.

It is an arithmetic number, because the mean of its divisors is an integer number (1456816).

Almost surely, 2^5645131 is an apocalyptic number.

5645131 is a deficient number, since it is larger than the sum of its proper divisors (182133).

5645131 is a wasteful number, since it uses less digits than its factorization.

5645131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182132.

The product of its digits is 1800, while the sum is 25.

The square root of 5645131 is about 2375.9484422016. The cubic root of 5645131 is about 178.0565720953.

It can be divided in two parts, 5645 and 131, that added together give a square (5776 = 76²).

The spelling of 5645131 in words is "five million, six hundred forty-five thousand, one hundred thirty-one".