421257064 has 16 divisors (see below), whose sum is σ = 790157700. Its totient is φ = 210548352.

The previous prime is 421257061. The next prime is 421257071. The reversal of 421257064 is 460752124.

It can be written as a sum of positive squares in 2 ways, for example, as 394816900 + 26440164 = 19870^2 + 5142^2 .

It is not an unprimeable number, because it can be changed into a prime (421257061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16404 + ... + 33340.

Almost surely, 2^421257064 is an apocalyptic number.

It is an amenable number.

421257064 is a deficient number, since it is larger than the sum of its proper divisors (368900636).

421257064 is a wasteful number, since it uses less digits than its factorization.

421257064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20052 (or 20048 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 421257064 is about 20524.5478391121. The cubic root of 421257064 is about 749.6336367702.

The spelling of 421257064 in words is "four hundred twenty-one million, two hundred fifty-seven thousand, sixty-four".