501965 has 4 divisors (see below), whose sum is σ = 602364. Its totient is φ = 401568.

The previous prime is 501953. The next prime is 501967. The reversal of 501965 is 569105.

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 212521 + 289444 = 461^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 501965 - 2¹² = 497869 is a prime.

It is a super-2 number, since 2×501965² = 503937722450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501967) 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, 50192 + ... + 50201.

It is an arithmetic number, because the mean of its divisors is an integer number (150591).

2⁵⁰¹⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

501965 is a deficient number, since it is larger than the sum of its proper divisors (100399).

501965 is a wasteful number, since it uses less digits than its factorization.

501965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100398.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 501965 is about 708.4948835383. The cubic root of 501965 is about 79.4738914570.

The spelling of 501965 in words is "five hundred one thousand, nine hundred sixty-five".