420433525 has 6 divisors (see below), whose sum is σ = 521337602. Its totient is φ = 336346800.

The previous prime is 420433523. The next prime is 420433543. The reversal of 420433525 is 525334024.

It can be written as a sum of positive squares in 3 ways, for example, as 60516 + 420373009 = 246^2 + 20503^2 .

It is not a de Polignac number, because 420433525 - 2¹ = 420433523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420433493 and 420433502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420433523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8408646 + ... + 8408695.

Almost surely, 2^420433525 is an apocalyptic number.

It is an amenable number.

420433525 is a deficient number, since it is larger than the sum of its proper divisors (100904077).

420433525 is a wasteful number, since it uses less digits than its factorization.

420433525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16817351 (or 16817346 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 420433525 is about 20504.4757309227. The cubic root of 420433525 is about 749.1448178479.

Adding to 420433525 its reverse (525334024), we get a palindrome (945767549).

The spelling of 420433525 in words is "four hundred twenty million, four hundred thirty-three thousand, five hundred twenty-five".