1311245408 has 48 divisors (see below), whose sum is σ = 2826363456. Its totient is φ = 593869440.

The previous prime is 1311245407. The next prime is 1311245437. The reversal of 1311245408 is 8045421131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311245407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93035 + ... + 106197.

It is an arithmetic number, because the mean of its divisors is an integer number (58882572).

Almost surely, 2^1311245408 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 1311245408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1413181728).

1311245408 is an abundant number, since it is smaller than the sum of its proper divisors (1515118048).

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

1311245408 is a wasteful number, since it uses less digits than its factorization.

1311245408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13467 (or 13459 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1311245408 is about 36211.1227111229. The cubic root of 1311245408 is about 1094.5308160003.

Adding to 1311245408 its reverse (8045421131), we get a palindrome (9356666539).

The spelling of 1311245408 in words is "one billion, three hundred eleven million, two hundred forty-five thousand, four hundred eight".