421922 has 4 divisors (see below), whose sum is σ = 632886. Its totient is φ = 210960.

The previous prime is 421913. The next prime is 421943. The reversal of 421922 is 229124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 261121 + 160801 = 511^2 + 401^2 .

It is a junction number, because it is equal to n+sod(n) for n = 421894 and 421903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105479 + ... + 105482.

2⁴²¹⁹²² is an apocalyptic number.

421922 is a deficient number, since it is larger than the sum of its proper divisors (210964).

421922 is a wasteful number, since it uses less digits than its factorization.

421922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210963.

The product of its digits is 288, while the sum is 20.

The square root of 421922 is about 649.5552324476. Note that the first 3 decimals coincide. The cubic root of 421922 is about 75.0027850818.

The spelling of 421922 in words is "four hundred twenty-one thousand, nine hundred twenty-two".