526561 has 4 divisors (see below), whose sum is σ = 601792. Its totient is φ = 451332.

The previous prime is 526543. The next prime is 526571. The reversal of 526561 is 165625.

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 526561 - 2⁹ = 526049 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (526501) 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, 37605 + ... + 37618.

It is an arithmetic number, because the mean of its divisors is an integer number (150448).

2⁵²⁶⁵⁶¹ is an apocalyptic number.

It is an amenable number.

526561 is a deficient number, since it is larger than the sum of its proper divisors (75231).

526561 is an equidigital number, since it uses as much as digits as its factorization.

526561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75230.

The product of its digits is 1800, while the sum is 25.

The square root of 526561 is about 725.6452301228. The cubic root of 526561 is about 80.7513075411.

The spelling of 526561 in words is "five hundred twenty-six thousand, five hundred sixty-one".