421782120 has 64 divisors (see below), whose sum is σ = 1405944000. Its totient is φ = 112474944.

The previous prime is 421782107. The next prime is 421782133. The reversal of 421782120 is 21287124.

It is an interprime number because it is at equal distance from previous prime (421782107) and next prime (421782133).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 194190 + ... + 196349.

It is an arithmetic number, because the mean of its divisors is an integer number (21967875).

Almost surely, 2^421782120 is an apocalyptic number.

421782120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421782120 is an abundant number, since it is smaller than the sum of its proper divisors (984161880).

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

421782120 is a wasteful number, since it uses less digits than its factorization.

421782120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390559 (or 390549 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 421782120 is about 20537.3347832673. The cubic root of 421782120 is about 749.9449559603.

The spelling of 421782120 in words is "four hundred twenty-one million, seven hundred eighty-two thousand, one hundred twenty".