436561 has 4 divisors (see below), whose sum is σ = 444852. Its totient is φ = 428272.

The previous prime is 436549. The next prime is 436571. The reversal of 436561 is 165634.

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 295936 + 140625 = 544^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 436561 - 2⁵ = 436529 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 (436531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4066 + ... + 4171.

It is an arithmetic number, because the mean of its divisors is an integer number (111213).

2⁴³⁶⁵⁶¹ is an apocalyptic number.

It is an amenable number.

436561 is a deficient number, since it is larger than the sum of its proper divisors (8291).

436561 is an equidigital number, since it uses as much as digits as its factorization.

436561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8290.

The product of its digits is 2160, while the sum is 25.

The square root of 436561 is about 660.7276292089. The cubic root of 436561 is about 75.8603738317.

The spelling of 436561 in words is "four hundred thirty-six thousand, five hundred sixty-one".