421671760 has 40 divisors (see below), whose sum is σ = 1003194720. Its totient is φ = 164744832.

The previous prime is 421671751. The next prime is 421671773. The reversal of 421671760 is 67176124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

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, 57850 + ... + 64729.

It is an arithmetic number, because the mean of its divisors is an integer number (25079868).

Almost surely, 2^421671760 is an apocalyptic number.

421671760 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421671760 is an abundant number, since it is smaller than the sum of its proper divisors (581522960).

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

421671760 is a wasteful number, since it uses less digits than its factorization.

421671760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122635 (or 122629 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 421671760 is about 20534.6477934247. The cubic root of 421671760 is about 749.8795421357.

The spelling of 421671760 in words is "four hundred twenty-one million, six hundred seventy-one thousand, seven hundred sixty".