5651865 has 12 divisors (see below), whose sum is σ = 9796644. Its totient is φ = 3014304.

The previous prime is 5651851. The next prime is 5651869. The reversal of 5651865 is 5681565.

It can be written as a sum of positive squares in 2 ways, for example, as 2368521 + 3283344 = 1539^2 + 1812^2 .

It is not a de Polignac number, because 5651865 - 2⁶ = 5651801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5651869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62754 + ... + 62843.

It is an arithmetic number, because the mean of its divisors is an integer number (816387).

Almost surely, 2^5651865 is an apocalyptic number.

It is an amenable number.

5651865 is a deficient number, since it is larger than the sum of its proper divisors (4144779).

5651865 is a wasteful number, since it uses less digits than its factorization.

5651865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125608 (or 125605 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 5651865 is about 2377.3651381309. The cubic root of 5651865 is about 178.1273443828.

Adding to 5651865 its product of digits (36000), we get a palindrome (5687865).

The spelling of 5651865 in words is "five million, six hundred fifty-one thousand, eight hundred sixty-five".