525421205 has 4 divisors (see below), whose sum is σ = 630505452. Its totient is φ = 420336960.

The previous prime is 525421199. The next prime is 525421207. The reversal of 525421205 is 502124525.

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 72965764 + 452455441 = 8542^2 + 21271^2 .

It is not a de Polignac number, because 525421205 - 2⁴ = 525421189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525421207) 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, 52542116 + ... + 52542125.

It is an arithmetic number, because the mean of its divisors is an integer number (157626363).

Almost surely, 2^525421205 is an apocalyptic number.

It is an amenable number.

525421205 is a deficient number, since it is larger than the sum of its proper divisors (105084247).

525421205 is a wasteful number, since it uses less digits than its factorization.

525421205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105084246.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 525421205 is about 22922.0680786006. The cubic root of 525421205 is about 806.9300063619.

The spelling of 525421205 in words is "five hundred twenty-five million, four hundred twenty-one thousand, two hundred five".