1155444 has 24 divisors (see below), whose sum is σ = 2735040. Its totient is φ = 379584.

The previous prime is 1155437. The next prime is 1155449. The reversal of 1155444 is 4445511.

It is a happy number.

It is an Ulam number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217 + ... + 1535.

It is an arithmetic number, because the mean of its divisors is an integer number (113960).

2^1155444 is an apocalyptic number.

It is an amenable number.

1155444 is an abundant number, since it is smaller than the sum of its proper divisors (1579596).

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

1155444 is a wasteful number, since it uses less digits than its factorization.

1155444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1397 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 1155444 is about 1074.9158106568. The cubic root of 1155444 is about 104.9340175019.

It can be divided in two parts, 11 and 55444, that added together give a palindrome (55455).

The spelling of 1155444 in words is "one million, one hundred fifty-five thousand, four hundred forty-four".