525281 has 4 divisors (see below), whose sum is σ = 529200. Its totient is φ = 521364.

The previous prime is 525257. The next prime is 525299. The reversal of 525281 is 182525.

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 525281 - 2¹⁰ = 524257 is a prime.

It is a super-2 number, since 2×525281² = 551840257922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 525281.

It is not an unprimeable number, because it can be changed into a prime (525221) 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, 1751 + ... + 2028.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

2⁵²⁵²⁸¹ is an apocalyptic number.

It is an amenable number.

525281 is a deficient number, since it is larger than the sum of its proper divisors (3919).

525281 is a wasteful number, since it uses less digits than its factorization.

525281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918.

The product of its digits is 800, while the sum is 23.

The square root of 525281 is about 724.7627197918. The cubic root of 525281 is about 80.6858225421.

The spelling of 525281 in words is "five hundred twenty-five thousand, two hundred eighty-one".