1131442144 has 144 divisors (see below), whose sum is σ = 2694284208. Its totient is φ = 466034688.

The previous prime is 1131442141. The next prime is 1131442177. The reversal of 1131442144 is 4412441311.

It is a super-2 number, since 2×1131442144² = 2560322650438633472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131442141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6540042 + ... + 6540214.

It is an arithmetic number, because the mean of its divisors is an integer number (18710307).

Almost surely, 2^1131442144 is an apocalyptic number.

1131442144 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 1131442144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347142104).

1131442144 is an abundant number, since it is smaller than the sum of its proper divisors (1562842064).

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

1131442144 is a wasteful number, since it uses less digits than its factorization.

1131442144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 322 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 1131442144 is about 33636.9163866131. The cubic root of 1131442144 is about 1042.0233489340.

Adding to 1131442144 its reverse (4412441311), we get a palindrome (5543883455).

The spelling of 1131442144 in words is "one billion, one hundred thirty-one million, four hundred forty-two thousand, one hundred forty-four".