421745210 has 8 divisors (see below), whose sum is σ = 759141396. Its totient is φ = 168698080.

The previous prime is 421745209. The next prime is 421745249. The reversal of 421745210 is 12547124.

It can be written as a sum of positive squares in 2 ways, for example, as 401160841 + 20584369 = 20029^2 + 4537^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 421745210.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21087251 + ... + 21087270.

Almost surely, 2^421745210 is an apocalyptic number.

421745210 is a deficient number, since it is larger than the sum of its proper divisors (337396186).

421745210 is a wasteful number, since it uses less digits than its factorization.

421745210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42174528.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 421745210 is about 20536.4361562565. The cubic root of 421745210 is about 749.9230795187.

The spelling of 421745210 in words is "four hundred twenty-one million, seven hundred forty-five thousand, two hundred ten".