1311455144 has 8 divisors (see below), whose sum is σ = 2458978410. Its totient is φ = 655727568.

The previous prime is 1311455141. The next prime is 1311455149. The reversal of 1311455144 is 4415541131.

It can be written as a sum of positive squares in only one way, i.e., 969575044 + 341880100 = 31138^2 + 18490^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1311455141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81965939 + ... + 81965954.

Almost surely, 2^1311455144 is an apocalyptic number.

It is an amenable number.

1311455144 is a deficient number, since it is larger than the sum of its proper divisors (1147523266).

1311455144 is a wasteful number, since it uses less digits than its factorization.

1311455144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163931899 (or 163931895 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 1311455144 is about 36214.0186115819. The cubic root of 1311455144 is about 1094.5891702629.

Adding to 1311455144 its reverse (4415541131), we get a palindrome (5726996275).

The spelling of 1311455144 in words is "one billion, three hundred eleven million, four hundred fifty-five thousand, one hundred forty-four".