506465 has 4 divisors (see below), whose sum is σ = 607764. Its totient is φ = 405168.

The previous prime is 506461. The next prime is 506479. The reversal of 506465 is 564605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564605 = 5 ⋅112921.

It can be written as a sum of positive squares in 2 ways, for example, as 388129 + 118336 = 623^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 506465 - 2² = 506461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 506465.

It is not an unprimeable number, because it can be changed into a prime (506461) 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, 50642 + ... + 50651.

It is an arithmetic number, because the mean of its divisors is an integer number (151941).

2⁵⁰⁶⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

506465 is a deficient number, since it is larger than the sum of its proper divisors (101299).

506465 is a wasteful number, since it uses less digits than its factorization.

506465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101298.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 506465 is about 711.6635440993. The cubic root of 506465 is about 79.7106736396.

The spelling of 506465 in words is "five hundred six thousand, four hundred sixty-five".