421278064 has 30 divisors (see below), whose sum is σ = 822093216. Its totient is φ = 209135520.

The previous prime is 421278059. The next prime is 421278073. The reversal of 421278064 is 460872124.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 424609 + ... + 425599.

Almost surely, 2^421278064 is an apocalyptic number.

It is an amenable number.

421278064 is a deficient number, since it is larger than the sum of its proper divisors (400815152).

421278064 is an equidigital number, since it uses as much as digits as its factorization.

421278064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 421278064 is about 20525.0594152611. The cubic root of 421278064 is about 749.6460931744.

The spelling of 421278064 in words is "four hundred twenty-one million, two hundred seventy-eight thousand, sixty-four".