525869 has 2 divisors, whose sum is σ = 525870. Its totient is φ = 525868.

The previous prime is 525839. The next prime is 525871. The reversal of 525869 is 968525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 469225 + 56644 = 685^2 + 238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525869 is a prime.

It is a super-2 number, since 2×525869² = 553076410322, which contains 22 as substring.

Together with 525871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525809) 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 as a sum of consecutive naturals, namely, 262934 + 262935.

It is an arithmetic number, because the mean of its divisors is an integer number (262935).

2⁵²⁵⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

525869 is a deficient number, since it is larger than the sum of its proper divisors (1).

525869 is an equidigital number, since it uses as much as digits as its factorization.

525869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 525869 is about 725.1682563378. The cubic root of 525869 is about 80.7159179081.

The spelling of 525869 in words is "five hundred twenty-five thousand, eight hundred sixty-nine".