420514521 has 12 divisors (see below), whose sum is σ = 652226832. Its totient is φ = 240293928.

The previous prime is 420514487. The next prime is 420514547. The reversal of 420514521 is 125415024.

It is not a de Polignac number, because 420514521 - 2⁹ = 420514009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420514491 and 420514500.

It is not an unprimeable number, because it can be changed into a prime (420514571) 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, 1430175 + ... + 1430468.

It is an arithmetic number, because the mean of its divisors is an integer number (54352236).

Almost surely, 2^420514521 is an apocalyptic number.

It is an amenable number.

420514521 is a deficient number, since it is larger than the sum of its proper divisors (231712311).

420514521 is a wasteful number, since it uses less digits than its factorization.

420514521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860660 (or 2860653 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 420514521 is about 20506.4507167867. The cubic root of 420514521 is about 749.1929220340.

Adding to 420514521 its reverse (125415024), we get a palindrome (545929545).

The spelling of 420514521 in words is "four hundred twenty million, five hundred fourteen thousand, five hundred twenty-one".