1312255240 has 32 divisors (see below), whose sum is σ = 2957400000. Its totient is φ = 524044224.

The previous prime is 1312255199. The next prime is 1312255247. The reversal of 1312255240 is 425522131.

It is not an unprimeable number, because it can be changed into a prime (1312255247) 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, 1740 + ... + 51259.

It is an arithmetic number, because the mean of its divisors is an integer number (92418750).

Almost surely, 2^1312255240 is an apocalyptic number.

1312255240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312255240 is an abundant number, since it is smaller than the sum of its proper divisors (1645144760).

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

1312255240 is a wasteful number, since it uses less digits than its factorization.

1312255240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53629 (or 53625 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1312255240 is about 36225.0636990468. The cubic root of 1312255240 is about 1094.8117216231.

Adding to 1312255240 its reverse (425522131), we get a palindrome (1737777371).

The spelling of 1312255240 in words is "one billion, three hundred twelve million, two hundred fifty-five thousand, two hundred forty".