421256 has 16 divisors (see below), whose sum is σ = 861840. Its totient is φ = 191440.

The previous prime is 421241. The next prime is 421273. The reversal of 421256 is 652124.

421256 = T₁₄₃ + T₁₄₄ + ... + T₁₇₅.

It is a happy number.

421256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an unprimeable number.

421256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2306 + ... + 2481.

It is an arithmetic number, because the mean of its divisors is an integer number (53865).

2⁴²¹²⁵⁶ is an apocalyptic number.

It is an amenable number.

421256 is an abundant number, since it is smaller than the sum of its proper divisors (440584).

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

421256 is a wasteful number, since it uses less digits than its factorization.

421256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4804 (or 4800 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 421256 is about 649.0423714982. The cubic root of 421256 is about 74.9633005635.

The spelling of 421256 in words is "four hundred twenty-one thousand, two hundred fifty-six".