421754256 has 320 divisors, whose sum is σ = 1561804800. Its totient is φ = 105753600.

The previous prime is 421754233. The next prime is 421754269. The reversal of 421754256 is 652457124.

It is a happy number.

It is a super-2 number, since 2×421754256² = 355753304908227072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 421754256.

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 63 ways as a sum of consecutive naturals, for example, 1030980 + ... + 1031388.

It is an arithmetic number, because the mean of its divisors is an integer number (4880640).

Almost surely, 2^421754256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421754256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780902400).

421754256 is an abundant number, since it is smaller than the sum of its proper divisors (1140050544).

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

421754256 is a wasteful number, since it uses less digits than its factorization.

421754256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 463 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 421754256 is about 20536.6563977684. The cubic root of 421754256 is about 749.9284411727.

The spelling of 421754256 in words is "four hundred twenty-one million, seven hundred fifty-four thousand, two hundred fifty-six".