1222142 has 4 divisors (see below), whose sum is σ = 1833216. Its totient is φ = 611070.

The previous prime is 1222129. The next prime is 1222157. The reversal of 1222142 is 2412221.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305534 + ... + 305537.

It is an arithmetic number, because the mean of its divisors is an integer number (458304).

2^1222142 is an apocalyptic number.

1222142 is a deficient number, since it is larger than the sum of its proper divisors (611074).

1222142 is an equidigital number, since it uses as much as digits as its factorization.

1222142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611073.

The product of its digits is 64, while the sum is 14.

The square root of 1222142 is about 1105.5053143246. The cubic root of 1222142 is about 106.9154717166.

Adding to 1222142 its reverse (2412221), we get a palindrome (3634363).

The spelling of 1222142 in words is "one million, two hundred twenty-two thousand, one hundred forty-two".