421530356 has 24 divisors (see below), whose sum is σ = 798474600. Its totient is φ = 193560192.

The previous prime is 421530353. The next prime is 421530367. The reversal of 421530356 is 653035124.

It can be written as a sum of positive squares in 4 ways, for example, as 34621456 + 386908900 = 5884^2 + 19670^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421530353) 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, 10331 + ... + 30818.

It is an arithmetic number, because the mean of its divisors is an integer number (33269775).

Almost surely, 2^421530356 is an apocalyptic number.

It is an amenable number.

421530356 is a deficient number, since it is larger than the sum of its proper divisors (376944244).

421530356 is a wasteful number, since it uses less digits than its factorization.

421530356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41363 (or 41361 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 421530356 is about 20531.2044459160. The cubic root of 421530356 is about 749.7957108782.

The spelling of 421530356 in words is "four hundred twenty-one million, five hundred thirty thousand, three hundred fifty-six".