1223442 has 48 divisors (see below), whose sum is σ = 2987712. Its totient is φ = 358560.

The previous prime is 1223437. The next prime is 1223447. The reversal of 1223442 is 2443221.

1223442 is a `hidden beast` number, since 1 + 223 + 442 = 666.

It is an interprime number because it is at equal distance from previous prime (1223437) and next prime (1223447).

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

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1223447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7243 + ... + 7409.

It is an arithmetic number, because the mean of its divisors is an integer number (62244).

2^1223442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1493856).

1223442 is an abundant number, since it is smaller than the sum of its proper divisors (1764270).

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

1223442 is a wasteful number, since it uses less digits than its factorization.

1223442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 220 counting only the distinct ones).

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

The square root of 1223442 is about 1106.0931244701. The cubic root of 1223442 is about 106.9533671659.

Adding to 1223442 its reverse (2443221), we get a palindrome (3666663).

The spelling of 1223442 in words is "one million, two hundred twenty-three thousand, four hundred forty-two".