420130521 has 12 divisors (see below), whose sum is σ = 607060272. Its totient is φ = 279992376.

The previous prime is 420130519. The next prime is 420130531. The reversal of 420130521 is 125031024.

It is not a de Polignac number, because 420130521 - 2¹ = 420130519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420130494 and 420130503.

It is not an unprimeable number, because it can be changed into a prime (420130531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29610 + ... + 41436.

It is an arithmetic number, because the mean of its divisors is an integer number (50588356).

Almost surely, 2^420130521 is an apocalyptic number.

It is an amenable number.

420130521 is a deficient number, since it is larger than the sum of its proper divisors (186929751).

420130521 is a wasteful number, since it uses less digits than its factorization.

420130521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15780 (or 15777 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 420130521 is about 20497.0856708948. The cubic root of 420130521 is about 748.9648064899.

Adding to 420130521 its reverse (125031024), we get a palindrome (545161545).

The spelling of 420130521 in words is "four hundred twenty million, one hundred thirty thousand, five hundred twenty-one".