420922 has 4 divisors (see below), whose sum is σ = 631386. Its totient is φ = 210460.

The previous prime is 420919. The next prime is 420929. The reversal of 420922 is 229024.

It is a happy number.

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., 395641 + 25281 = 629^2 + 159^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 420922.

It is not an unprimeable number, because it can be changed into a prime (420929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105229 + ... + 105232.

2⁴²⁰⁹²² is an apocalyptic number.

420922 is a deficient number, since it is larger than the sum of its proper divisors (210464).

420922 is a wasteful number, since it uses less digits than its factorization.

420922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210463.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 420922 is about 648.7850183227. The cubic root of 420922 is about 74.9434833482.

Subtracting from 420922 its sum of digits (19), we obtain a triangular number (420903 = T₉₁₇).

Adding to 420922 its reverse (229024), we get a palindrome (649946).

The spelling of 420922 in words is "four hundred twenty thousand, nine hundred twenty-two".