1155321244 has 48 divisors (see below), whose sum is σ = 2563464960. Its totient is φ = 442488960.

The previous prime is 1155321229. The next prime is 1155321269. The reversal of 1155321244 is 4421235511.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13617 + ... + 49960.

It is an arithmetic number, because the mean of its divisors is an integer number (53405520).

Almost surely, 2^1155321244 is an apocalyptic number.

1155321244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1155321244 is an abundant number, since it is smaller than the sum of its proper divisors (1408143716).

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

1155321244 is a wasteful number, since it uses less digits than its factorization.

1155321244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63658 (or 63656 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 1155321244 is about 33990.0168284748. The cubic root of 1155321244 is about 1049.3030125761.

Adding to 1155321244 its reverse (4421235511), we get a palindrome (5576556755).

The spelling of 1155321244 in words is "one billion, one hundred fifty-five million, three hundred twenty-one thousand, two hundred forty-four".