420415133425521 has 8 divisors (see below), whose sum is σ = 603673012098240. Its totient is φ = 258717005184912.

The previous prime is 420415133425517. The next prime is 420415133425559. The reversal of 420415133425521 is 125524331514024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420415133425521 - 2² = 420415133425517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420415133426521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5389937607981 + ... + 5389937608058.

It is an arithmetic number, because the mean of its divisors is an integer number (75459126512280).

Almost surely, 2^{420415133425521} is an apocalyptic number.

It is an amenable number.

420415133425521 is a deficient number, since it is larger than the sum of its proper divisors (183257878672719).

420415133425521 is a wasteful number, since it uses less digits than its factorization.

420415133425521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10779875216055.

The product of its (nonzero) digits is 576000, while the sum is 42.

Adding to 420415133425521 its reverse (125524331514024), we get a palindrome (545939464939545).

The spelling of 420415133425521 in words is "four hundred twenty trillion, four hundred fifteen billion, one hundred thirty-three million, four hundred twenty-five thousand, five hundred twenty-one".