421086528 has 42 divisors (see below), whose sum is σ = 1206970154. Its totient is φ = 140361984.

The previous prime is 421086521. The next prime is 421086551. The reversal of 421086528 is 825680124.

421086528 is a `hidden beast` number, since 42 + 10 + 86 + 528 = 666.

It can be written as a sum of positive squares in only one way, i.e., 366799104 + 54287424 = 19152^2 + 7368^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 421086492 and 421086501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421086521) 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, 364951 + ... + 366102.

Almost surely, 2^421086528 is an apocalyptic number.

421086528 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

421086528 is an abundant number, since it is smaller than the sum of its proper divisors (785883626).

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

421086528 is a wasteful number, since it uses less digits than its factorization.

421086528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731071 (or 731058 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 421086528 is about 20520.3929786932. The cubic root of 421086528 is about 749.5324659431.

The spelling of 421086528 in words is "four hundred twenty-one million, eighty-six thousand, five hundred twenty-eight".