1272144 has 40 divisors (see below), whose sum is σ = 3481920. Its totient is φ = 398848.

The previous prime is 1272133. The next prime is 1272151. The reversal of 1272144 is 4412721.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (87048).

2^1272144 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 1272144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1740960).

1272144 is an abundant number, since it is smaller than the sum of its proper divisors (2209776).

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

1272144 is a wasteful number, since it uses less digits than its factorization.

1272144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587 (or 1581 counting only the distinct ones).

The product of its digits is 448, while the sum is 21.

The square root of 1272144 is about 1127.8936120043. The cubic root of 1272144 is about 108.3541188257.

Adding to 1272144 its reverse (4412721), we get a palindrome (5684865).

The spelling of 1272144 in words is "one million, two hundred seventy-two thousand, one hundred forty-four".