1224142 has 4 divisors (see below), whose sum is σ = 1836216. Its totient is φ = 612070.

The previous prime is 1224133. The next prime is 1224149. The reversal of 1224142 is 2414221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306034 + ... + 306037.

It is an arithmetic number, because the mean of its divisors is an integer number (459054).

2^1224142 is an apocalyptic number.

1224142 is a deficient number, since it is larger than the sum of its proper divisors (612074).

1224142 is an equidigital number, since it uses as much as digits as its factorization.

1224142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612073.

The product of its digits is 128, while the sum is 16.

The square root of 1224142 is about 1106.4095082744. The cubic root of 1224142 is about 106.9737612898.

Adding to 1224142 its reverse (2414221), we get a palindrome (3638363).

The spelling of 1224142 in words is "one million, two hundred twenty-four thousand, one hundred forty-two".