1312420532240 has 20 divisors (see below), whose sum is σ = 3051377737644. Its totient is φ = 524968212864.

The previous prime is 1312420532239. The next prime is 1312420532317. The reversal of 1312420532240 is 422350242131.

It can be written as a sum of positive squares in 2 ways, for example, as 1049592054016 + 262828478224 = 1024496^2 + 512668^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 8202628247 + ... + 8202628406.

Almost surely, 2^{1312420532240} is an apocalyptic number.

1312420532240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312420532240 is an abundant number, since it is smaller than the sum of its proper divisors (1738957205404).

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

1312420532240 is a wasteful number, since it uses less digits than its factorization.

1312420532240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16405256666 (or 16405256660 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 1312420532240 its reverse (422350242131), we get a palindrome (1734770774371).

The spelling of 1312420532240 in words is "one trillion, three hundred twelve billion, four hundred twenty million, five hundred thirty-two thousand, two hundred forty".