656465 has 4 divisors (see below), whose sum is σ = 787764. Its totient is φ = 525168.

The previous prime is 656459. The next prime is 656471. The reversal of 656465 is 564656.

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

It is an interprime number because it is at equal distance from previous prime (656459) and next prime (656471).

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 231361 = 652^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 656465 - 2¹² = 652369 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 656465.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65642 + ... + 65651.

It is an arithmetic number, because the mean of its divisors is an integer number (196941).

2⁶⁵⁶⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

656465 is a deficient number, since it is larger than the sum of its proper divisors (131299).

656465 is a wasteful number, since it uses less digits than its factorization.

656465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131298.

The product of its digits is 21600, while the sum is 32.

The square root of 656465 is about 810.2252773149. The cubic root of 656465 is about 86.9101551905.

Subtracting from 656465 its reverse (564656), we obtain a square (91809 = 303²).

The spelling of 656465 in words is "six hundred fifty-six thousand, four hundred sixty-five".