1142272 has 40 divisors (see below), whose sum is σ = 2406096. Its totient is φ = 540672.

The previous prime is 1142269. The next prime is 1142279. The reversal of 1142272 is 2722411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11728 + ... + 11824.

2^1142272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1203048).

1142272 is an abundant number, since it is smaller than the sum of its proper divisors (1263824).

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

1142272 is an frugal number, since it uses more digits than its factorization.

1142272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 122 counting only the distinct ones).

The product of its digits is 224, while the sum is 19.

The square root of 1142272 is about 1068.7712570985. The cubic root of 1142272 is about 104.5337451971.

Adding to 1142272 its reverse (2722411), we get a palindrome (3864683).

The spelling of 1142272 in words is "one million, one hundred forty-two thousand, two hundred seventy-two".