5306561 has 4 divisors (see below), whose sum is σ = 5714772. Its totient is φ = 4898352.

The previous prime is 5306531. The next prime is 5306569. The reversal of 5306561 is 1656035.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1656035 = 5 ⋅331207.

It can be written as a sum of positive squares in 2 ways, for example, as 3041536 + 2265025 = 1744^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 5306561 - 2¹⁰ = 5305537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5306561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5306569) 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, 204086 + ... + 204111.

It is an arithmetic number, because the mean of its divisors is an integer number (1428693).

Almost surely, 2^5306561 is an apocalyptic number.

It is an amenable number.

5306561 is a deficient number, since it is larger than the sum of its proper divisors (408211).

5306561 is a wasteful number, since it uses less digits than its factorization.

5306561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408210.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 5306561 is about 2303.5974040617. The cubic root of 5306561 is about 174.4232550597.

The spelling of 5306561 in words is "five million, three hundred six thousand, five hundred sixty-one".