1155144252 has 24 divisors (see below), whose sum is σ = 2699201232. Its totient is φ = 384496000.

The previous prime is 1155144223. The next prime is 1155144257. The reversal of 1155144252 is 2524415511.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155144257) 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, 60249 + ... + 77072.

It is an arithmetic number, because the mean of its divisors is an integer number (112466718).

Almost surely, 2^1155144252 is an apocalyptic number.

1155144252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155144252 is an abundant number, since it is smaller than the sum of its proper divisors (1544056980).

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

1155144252 is a wasteful number, since it uses less digits than its factorization.

1155144252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138029 (or 138027 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The square root of 1155144252 is about 33987.4131407496. The cubic root of 1155144252 is about 1049.2494264056.

Adding to 1155144252 its reverse (2524415511), we get a palindrome (3679559763).

The spelling of 1155144252 in words is "one billion, one hundred fifty-five million, one hundred forty-four thousand, two hundred fifty-two".