1312261362156 has 48 divisors (see below), whose sum is σ = 3082413712896. Its totient is φ = 434499725184.

The previous prime is 1312261362149. The next prime is 1312261362157. The reversal of 1312261362156 is 6512631622131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1312261362157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2673520 + ... + 3126056.

It is an arithmetic number, because the mean of its divisors is an integer number (64216952352).

Almost surely, 2^{1312261362156} is an apocalyptic number.

It is an amenable number.

1312261362156 is an abundant number, since it is smaller than the sum of its proper divisors (1770152350740).

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

1312261362156 is a wasteful number, since it uses less digits than its factorization.

1312261362156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454158 (or 454156 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

Adding to 1312261362156 its reverse (6512631622131), we get a palindrome (7824892984287).

The spelling of 1312261362156 in words is "one trillion, three hundred twelve billion, two hundred sixty-one million, three hundred sixty-two thousand, one hundred fifty-six".