1312122240 has 768 divisors, whose sum is σ = 5613753600. Its totient is φ = 288645120.

The previous prime is 1312122233. The next prime is 1312122257. The reversal of 1312122240 is 422212131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 95 ways as a sum of consecutive naturals, for example, 22239331 + ... + 22239389.

It is an arithmetic number, because the mean of its divisors is an integer number (7309575).

Almost surely, 2^1312122240 is an apocalyptic number.

1312122240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2806876800).

1312122240 is an abundant number, since it is smaller than the sum of its proper divisors (4301631360).

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

1312122240 is a wasteful number, since it uses less digits than its factorization.

1312122240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1312122240 is about 36223.2279069660. The cubic root of 1312122240 is about 1094.7747331689.

Adding to 1312122240 its reverse (422212131), we get a palindrome (1734334371).

The spelling of 1312122240 in words is "one billion, three hundred twelve million, one hundred twenty-two thousand, two hundred forty".