1243422 has 24 divisors (see below), whose sum is σ = 2768376. Its totient is φ = 403056.

The previous prime is 1243421. The next prime is 1243427. The reversal of 1243422 is 2243421.

1243422 is a `hidden beast` number, since 1 + 243 + 422 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1243395 and 1243404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268 + ... + 1599.

It is an arithmetic number, because the mean of its divisors is an integer number (115349).

2^1243422 is an apocalyptic number.

1243422 is an abundant number, since it is smaller than the sum of its proper divisors (1524954).

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

1243422 is a wasteful number, since it uses less digits than its factorization.

1243422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912 (or 1909 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 1243422 is about 1115.0883373079. The cubic root of 1243422 is about 107.5324437859.

Adding to 1243422 its reverse (2243421), we get a palindrome (3486843).

Subtracting 1243422 from its reverse (2243421), we obtain a palindrome (999999).

It can be divided in two parts, 12 and 43422, that added together give a palindrome (43434).

The spelling of 1243422 in words is "one million, two hundred forty-three thousand, four hundred twenty-two".