420112521 has 8 divisors (see below), whose sum is σ = 622388960. Its totient is φ = 280074996.

The previous prime is 420112507. The next prime is 420112559. The reversal of 420112521 is 125211024.

It is not a de Polignac number, because 420112521 - 2¹³ = 420104329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420112494 and 420112503.

It is not an unprimeable number, because it can be changed into a prime (420112501) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7779835 + ... + 7779888.

It is an arithmetic number, because the mean of its divisors is an integer number (77798620).

Almost surely, 2^420112521 is an apocalyptic number.

It is an amenable number.

420112521 is a deficient number, since it is larger than the sum of its proper divisors (202276439).

420112521 is a wasteful number, since it uses less digits than its factorization.

420112521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15559732 (or 15559726 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 420112521 is about 20496.6465793798. The cubic root of 420112521 is about 748.9541101639.

Adding to 420112521 its reverse (125211024), we get a palindrome (545323545).

The spelling of 420112521 in words is "four hundred twenty million, one hundred twelve thousand, five hundred twenty-one".