421535590 has 32 divisors (see below), whose sum is σ = 897065280. Its totient is φ = 139542144.

The previous prime is 421535581. The next prime is 421535593. The reversal of 421535590 is 95535124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421535593) 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 15 ways as a sum of consecutive naturals, for example, 101797 + ... + 105856.

It is an arithmetic number, because the mean of its divisors is an integer number (28033290).

Almost surely, 2^421535590 is an apocalyptic number.

421535590 is an abundant number, since it is smaller than the sum of its proper divisors (475529690).

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

421535590 is a wasteful number, since it uses less digits than its factorization.

421535590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207696.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 421535590 is about 20531.3319100345. The cubic root of 421535590 is about 749.7988141853.

The spelling of 421535590 in words is "four hundred twenty-one million, five hundred thirty-five thousand, five hundred ninety".