1311453240 has 64 divisors (see below), whose sum is σ = 3943900800. Its totient is φ = 348872832.

The previous prime is 1311453193. The next prime is 1311453251. The reversal of 1311453240 is 423541131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1311453240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37239 + ... + 63321.

It is an arithmetic number, because the mean of its divisors is an integer number (61623450).

Almost surely, 2^1311453240 is an apocalyptic number.

1311453240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311453240 is an abundant number, since it is smaller than the sum of its proper divisors (2632447560).

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

1311453240 is a wasteful number, since it uses less digits than its factorization.

1311453240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26516 (or 26512 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1311453240 is about 36213.9923234100. The cubic root of 1311453240 is about 1094.5886405463.

Adding to 1311453240 its reverse (423541131), we get a palindrome (1734994371).

The spelling of 1311453240 in words is "one billion, three hundred eleven million, four hundred fifty-three thousand, two hundred forty".