422724 has 12 divisors (see below), whose sum is σ = 986384. Its totient is φ = 140904.

The previous prime is 422711. The next prime is 422749. The reversal of 422724 is 427224.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 422724.

It is an unprimeable number.

422724 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, 17602 + ... + 17625.

2⁴²²⁷²⁴ is an apocalyptic number.

It is an amenable number.

422724 is an abundant number, since it is smaller than the sum of its proper divisors (563660).

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

422724 is a wasteful number, since it uses less digits than its factorization.

422724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35234 (or 35232 counting only the distinct ones).

The product of its digits is 896, while the sum is 21.

The square root of 422724 is about 650.1722848599. The cubic root of 422724 is about 75.0502773994.

Adding to 422724 its reverse (427224), we get a palindrome (849948).

The spelling of 422724 in words is "four hundred twenty-two thousand, seven hundred twenty-four", and thus it is an iban number.