5921665 has 8 divisors (see below), whose sum is σ = 7298280. Its totient is φ = 4609152.

The previous prime is 5921639. The next prime is 5921677. The reversal of 5921665 is 5661295.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 166464 + 5755201 = 408^2 + 2399^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5921665 - 2¹³ = 5913473 is a prime.

It is a super-2 number, since 2×5921665² = 70132232744450, which contains 22 as substring.

5921665 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5921665.

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 7 ways as a sum of consecutive naturals, for example, 15820 + ... + 16189.

It is an arithmetic number, because the mean of its divisors is an integer number (912285).

Almost surely, 2^5921665 is an apocalyptic number.

It is an amenable number.

5921665 is a deficient number, since it is larger than the sum of its proper divisors (1376615).

5921665 is a wasteful number, since it uses less digits than its factorization.

5921665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32051.

The product of its digits is 16200, while the sum is 34.

The square root of 5921665 is about 2433.4471434572. The cubic root of 5921665 is about 180.9177917937.

The spelling of 5921665 in words is "five million, nine hundred twenty-one thousand, six hundred sixty-five".