1144542 has 48 divisors (see below), whose sum is σ = 2831760. Its totient is φ = 306432.

The previous prime is 1144537. The next prime is 1144573. The reversal of 1144542 is 2454411.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 in 23 ways as a sum of consecutive naturals, for example, 4884 + ... + 5112.

It is an arithmetic number, because the mean of its divisors is an integer number (58995).

2^1144542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1144542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415880).

1144542 is an abundant number, since it is smaller than the sum of its proper divisors (1687218).

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

1144542 is a wasteful number, since it uses less digits than its factorization.

1144542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 258 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 1144542 is about 1069.8326972008. The cubic root of 1144542 is about 104.6029448821.

Adding to 1144542 its reverse (2454411), we get a palindrome (3598953).

It can be divided in two parts, 11445 and 42, that multiplied together give a triangular number (480690 = T₉₈₀).

The spelling of 1144542 in words is "one million, one hundred forty-four thousand, five hundred forty-two".