536421 has 4 divisors (see below), whose sum is σ = 715232. Its totient is φ = 357612.

The previous prime is 536407. The next prime is 536423. The reversal of 536421 is 124635.

It is a happy number.

536421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 536421 - 2⁶ = 536357 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 536421.

It is not an unprimeable number, because it can be changed into a prime (536423) 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, 89401 + ... + 89406.

It is an arithmetic number, because the mean of its divisors is an integer number (178808).

2⁵³⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

536421 is a deficient number, since it is larger than the sum of its proper divisors (178811).

536421 is a wasteful number, since it uses less digits than its factorization.

536421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178810.

The product of its digits is 720, while the sum is 21.

The square root of 536421 is about 732.4076733623. The cubic root of 536421 is about 81.2522240022.

The spelling of 536421 in words is "five hundred thirty-six thousand, four hundred twenty-one".