1311456156 has 24 divisors (see below), whose sum is σ = 3060779904. Its totient is φ = 437049840.

The previous prime is 1311456151. The next prime is 1311456161. The reversal of 1311456156 is 6516541131.

It is an interprime number because it is at equal distance from previous prime (1311456151) and next prime (1311456161).

It is a super-3 number, since 3×1311456156³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311456151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55111 + ... + 75233.

It is an arithmetic number, because the mean of its divisors is an integer number (127532496).

Almost surely, 2^1311456156 is an apocalyptic number.

It is an amenable number.

1311456156 is an abundant number, since it is smaller than the sum of its proper divisors (1749323748).

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

1311456156 is a wasteful number, since it uses less digits than its factorization.

1311456156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25561 (or 25559 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 1311456156 is about 36214.0325840688. The cubic root of 1311456156 is about 1094.5894518138.

Adding to 1311456156 its reverse (6516541131), we get a palindrome (7827997287).

The spelling of 1311456156 in words is "one billion, three hundred eleven million, four hundred fifty-six thousand, one hundred fifty-six".