420243525 has 96 divisors (see below), whose sum is σ = 842862720. Its totient is φ = 204042240.

The previous prime is 420243517. The next prime is 420243547. The reversal of 420243525 is 525342024.

It is a happy number.

420243525 is a `hidden beast` number, since 4 + 202 + 435 + 25 = 666.

It is not a de Polignac number, because 420243525 - 2³ = 420243517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 728037 + ... + 728613.

It is an arithmetic number, because the mean of its divisors is an integer number (8779820).

Almost surely, 2^420243525 is an apocalyptic number.

420243525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

420243525 is an abundant number, since it is smaller than the sum of its proper divisors (422619195).

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

420243525 is a wasteful number, since it uses less digits than its factorization.

420243525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 420243525 is about 20499.8420725624. The cubic root of 420243525 is about 749.0319510459.

Adding to 420243525 its reverse (525342024), we get a palindrome (945585549).

The spelling of 420243525 in words is "four hundred twenty million, two hundred forty-three thousand, five hundred twenty-five".