1223142 has 8 divisors (see below), whose sum is σ = 2446296. Its totient is φ = 407712.

The previous prime is 1223119. The next prime is 1223149. The reversal of 1223142 is 2413221.

It is a sphenic number, since it is the product of 3 distinct primes.

1223142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101923 + ... + 101934.

It is an arithmetic number, because the mean of its divisors is an integer number (305787).

2^1223142 is an apocalyptic number.

1223142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1223142 is a wasteful number, since it uses less digits than its factorization.

1223142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203862.

The product of its digits is 96, while the sum is 15.

The square root of 1223142 is about 1105.9575037044. The cubic root of 1223142 is about 106.9446244458.

Adding to 1223142 its reverse (2413221), we get a palindrome (3636363).

The spelling of 1223142 in words is "one million, two hundred twenty-three thousand, one hundred forty-two".