1147142144 has 44 divisors (see below), whose sum is σ = 2298478044. Its totient is φ = 572522496.

The previous prime is 1147142141. The next prime is 1147142147. The reversal of 1147142144 is 4412417411.

It is an interprime number because it is at equal distance from previous prime (1147142141) and next prime (1147142147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147142141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2096879 + ... + 2097425.

Almost surely, 2^1147142144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1147142144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149239022).

1147142144 is an abundant number, since it is smaller than the sum of its proper divisors (1151335900).

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

1147142144 is an frugal number, since it uses more digits than its factorization.

1147142144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 549 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 1147142144 is about 33869.4869166924. The cubic root of 1147142144 is about 1046.8209648967.

Adding to 1147142144 its reverse (4412417411), we get a palindrome (5559559555).

The spelling of 1147142144 in words is "one billion, one hundred forty-seven million, one hundred forty-two thousand, one hundred forty-four".