525121 has 4 divisors (see below), whose sum is σ = 529092. Its totient is φ = 521152.

The previous prime is 525101. The next prime is 525127. The reversal of 525121 is 121525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207025 + 318096 = 455^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 525121 - 2¹⁷ = 394049 is a prime.

It is a Duffinian number.

525121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 525095 and 525104.

It is not an unprimeable number, because it can be changed into a prime (525127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780 + ... + 2053.

It is an arithmetic number, because the mean of its divisors is an integer number (132273).

2⁵²⁵¹²¹ is an apocalyptic number.

It is an amenable number.

525121 is a deficient number, since it is larger than the sum of its proper divisors (3971).

525121 is a wasteful number, since it uses less digits than its factorization.

525121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970.

The product of its digits is 100, while the sum is 16.

The square root of 525121 is about 724.6523304316. The cubic root of 525121 is about 80.6776294400.

Adding to 525121 its reverse (121525), we get a palindrome (646646).

It can be divided in two parts, 525 and 121, that added together give a palindrome (646).

The spelling of 525121 in words is "five hundred twenty-five thousand, one hundred twenty-one".