496561 has 4 divisors (see below), whose sum is σ = 534772. Its totient is φ = 458352.

The previous prime is 496549. The next prime is 496579. The reversal of 496561 is 165694.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165694 = 2 ⋅82847.

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 378225 = 344^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 496561 - 2¹⁷ = 365489 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (496511) 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, 19086 + ... + 19111.

It is an arithmetic number, because the mean of its divisors is an integer number (133693).

2⁴⁹⁶⁵⁶¹ is an apocalyptic number.

It is an amenable number.

496561 is a deficient number, since it is larger than the sum of its proper divisors (38211).

496561 is a wasteful number, since it uses less digits than its factorization.

496561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38210.

The product of its digits is 6480, while the sum is 31.

The square root of 496561 is about 704.6708451469. The cubic root of 496561 is about 79.1876647286.

It can be divided in two parts, 49 and 6561, that multiplied together give a square (321489 = 567²).

The spelling of 496561 in words is "four hundred ninety-six thousand, five hundred sixty-one".