5643145 has 4 divisors (see below), whose sum is σ = 6771780. Its totient is φ = 4514512.

The previous prime is 5643137. The next prime is 5643161. The reversal of 5643145 is 5413465.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2471184 + 3171961 = 1572^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 5643145 - 2³ = 5643137 is a prime.

It is an unprimeable number.

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, 564310 + ... + 564319.

It is an arithmetic number, because the mean of its divisors is an integer number (1692945).

Almost surely, 2^5643145 is an apocalyptic number.

It is an amenable number.

5643145 is a deficient number, since it is larger than the sum of its proper divisors (1128635).

5643145 is a wasteful number, since it uses less digits than its factorization.

5643145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128634.

The product of its digits is 7200, while the sum is 28.

The square root of 5643145 is about 2375.5304670747. The cubic root of 5643145 is about 178.0356890943.

The spelling of 5643145 in words is "five million, six hundred forty-three thousand, one hundred forty-five".