421026516 has 36 divisors (see below), whose sum is σ = 1065491700. Its totient is φ = 140179968.

The previous prime is 421026511. The next prime is 421026559. The reversal of 421026516 is 615620124.

421026516 is a `hidden beast` number, since 4 + 2 + 1 + 0 + 2 + 651 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19184400 + 401842116 = 4380^2 + 20046^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 421026516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421026511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27150 + ... + 39738.

Almost surely, 2^421026516 is an apocalyptic number.

It is an amenable number.

421026516 is an abundant number, since it is smaller than the sum of its proper divisors (644465184).

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

421026516 is a wasteful number, since it uses less digits than its factorization.

421026516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13528 (or 13523 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 421026516 is about 20518.9306738923. The cubic root of 421026516 is about 749.4968572053.

The spelling of 421026516 in words is "four hundred twenty-one million, twenty-six thousand, five hundred sixteen".