525205420 has 24 divisors (see below), whose sum is σ = 1103382000. Its totient is φ = 209996352.

The previous prime is 525205409. The next prime is 525205423. The reversal of 525205420 is 24502525.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (525205423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72106 + ... + 79054.

It is an arithmetic number, because the mean of its divisors is an integer number (45974250).

Almost surely, 2^525205420 is an apocalyptic number.

It is an amenable number.

525205420 is an abundant number, since it is smaller than the sum of its proper divisors (578176580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525205420 is a wasteful number, since it uses less digits than its factorization.

525205420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10737 (or 10735 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 525205420 is about 22917.3606682794. The cubic root of 525205420 is about 806.8195253281.

Adding to 525205420 its reverse (24502525), we get a palindrome (549707945).

It can be divided in two parts, 525205 and 420, that added together give a square (525625 = 725²).

The spelling of 525205420 in words is "five hundred twenty-five million, two hundred five thousand, four hundred twenty".