536721 has 4 divisors (see below), whose sum is σ = 715632. Its totient is φ = 357812.

The previous prime is 536719. The next prime is 536729. The reversal of 536721 is 127635.

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 a cyclic number.

It is not a de Polignac number, because 536721 - 2¹ = 536719 is a prime.

It is a D-number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 536691 and 536700.

It is not an unprimeable number, because it can be changed into a prime (536729) 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, 89451 + ... + 89456.

It is an arithmetic number, because the mean of its divisors is an integer number (178908).

2⁵³⁶⁷²¹ is an apocalyptic number.

It is an amenable number.

536721 is a deficient number, since it is larger than the sum of its proper divisors (178911).

536721 is a wasteful number, since it uses less digits than its factorization.

536721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178910.

The product of its digits is 1260, while the sum is 24.

The square root of 536721 is about 732.6124487067. The cubic root of 536721 is about 81.2673682791.

The spelling of 536721 in words is "five hundred thirty-six thousand, seven hundred twenty-one".