436021 has 4 divisors (see below), whose sum is σ = 437344. Its totient is φ = 434700.

The previous prime is 436013. The next prime is 436027. The reversal of 436021 is 120634.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120634 = 2 ⋅60317.

It is a cyclic number.

It is not a de Polignac number, because 436021 - 2³ = 436013 is a prime.

It is a super-2 number, since 2×436021² = 380228624882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 435986 and 436004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (436027) 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, 286 + ... + 976.

It is an arithmetic number, because the mean of its divisors is an integer number (109336).

2⁴³⁶⁰²¹ is an apocalyptic number.

It is an amenable number.

436021 is a deficient number, since it is larger than the sum of its proper divisors (1323).

436021 is an equidigital number, since it uses as much as digits as its factorization.

436021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 436021 is about 660.3188623688. The cubic root of 436021 is about 75.8290826691.

Adding to 436021 its reverse (120634), we get a palindrome (556655).

The spelling of 436021 in words is "four hundred thirty-six thousand, twenty-one".