420415524 has 18 divisors (see below), whose sum is σ = 1062717110. Its totient is φ = 140138496.

The previous prime is 420415511. The next prime is 420415529. The reversal of 420415524 is 425514024.

It can be written as a sum of positive squares in only one way, i.e., 404733924 + 15681600 = 20118^2 + 3960^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (420415529) 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, 5839069 + ... + 5839140.

Almost surely, 2^420415524 is an apocalyptic number.

It is an amenable number.

420415524 is an abundant number, since it is smaller than the sum of its proper divisors (642301586).

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

420415524 is a wasteful number, since it uses less digits than its factorization.

420415524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11678219 (or 11678214 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 420415524 is about 20504.0367732795. The cubic root of 420415524 is about 749.1341260678.

Adding to 420415524 its reverse (425514024), we get a palindrome (845929548).

The spelling of 420415524 in words is "four hundred twenty million, four hundred fifteen thousand, five hundred twenty-four".