1311200144 has 20 divisors (see below), whose sum is σ = 2547657996. Its totient is φ = 653740032.

The previous prime is 1311200141. The next prime is 1311200153. The reversal of 1311200144 is 4410021131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 915667600 + 395532544 = 30260^2 + 19888^2 .

It is not an unprimeable number, because it can be changed into a prime (1311200141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110429 + ... + 121724.

Almost surely, 2^1311200144 is an apocalyptic number.

It is an amenable number.

1311200144 is a deficient number, since it is larger than the sum of its proper divisors (1236457852).

1311200144 is a wasteful number, since it uses less digits than its factorization.

1311200144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232514 (or 232508 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1311200144 is about 36210.4977043951. The cubic root of 1311200144 is about 1094.5182215074.

Adding to 1311200144 its reverse (4410021131), we get a palindrome (5721221275).

The spelling of 1311200144 in words is "one billion, three hundred eleven million, two hundred thousand, one hundred forty-four".