1154121444 has 144 divisors (see below), whose sum is σ = 3467283456. Its totient is φ = 316742400.

The previous prime is 1154121421. The next prime is 1154121461. The reversal of 1154121444 is 4441214511.

It is a happy number.

1154121444 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1226014 + ... + 1226954.

Almost surely, 2^1154121444 is an apocalyptic number.

1154121444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1154121444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1733641728).

1154121444 is an abundant number, since it is smaller than the sum of its proper divisors (2313162012).

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

1154121444 is a wasteful number, since it uses less digits than its factorization.

1154121444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1141 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 1154121444 is about 33972.3629440167. The cubic root of 1154121444 is about 1048.9396533748.

Adding to 1154121444 its reverse (4441214511), we get a palindrome (5595335955).

The spelling of 1154121444 in words is "one billion, one hundred fifty-four million, one hundred twenty-one thousand, four hundred forty-four".