535621 has 4 divisors (see below), whose sum is σ = 537292. Its totient is φ = 533952.

The previous prime is 535609. The next prime is 535627. The reversal of 535621 is 126535.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126535 = 5 ⋅25307.

It can be written as a sum of positive squares in 2 ways, for example, as 220900 + 314721 = 470^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 535621 - 2⁵ = 535589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 535592 and 535601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (535627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (134323).

2⁵³⁵⁶²¹ is an apocalyptic number.

It is an amenable number.

535621 is a deficient number, since it is larger than the sum of its proper divisors (1671).

535621 is a wasteful number, since it uses less digits than its factorization.

535621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670.

The product of its digits is 900, while the sum is 22.

The square root of 535621 is about 731.8613256622. The cubic root of 535621 is about 81.2118116397.

It can be divided in two parts, 535 and 621, that added together give a square (1156 = 34²).

The spelling of 535621 in words is "five hundred thirty-five thousand, six hundred twenty-one".