1312135456261 has 32 divisors (see below), whose sum is σ = 1542675783168. Its totient is φ = 1092975206400.

The previous prime is 1312135456241. The next prime is 1312135456483. The reversal of 1312135456261 is 1626545312131.

It is not a de Polignac number, because 1312135456261 - 2³¹ = 1309987972613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312135456211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8149045 + ... + 8308501.

It is an arithmetic number, because the mean of its divisors is an integer number (48208618224).

Almost surely, 2^{1312135456261} is an apocalyptic number.

It is an amenable number.

1312135456261 is a deficient number, since it is larger than the sum of its proper divisors (230540326907).

1312135456261 is a wasteful number, since it uses less digits than its factorization.

1312135456261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159781.

The product of its digits is 129600, while the sum is 40.

The spelling of 1312135456261 in words is "one trillion, three hundred twelve billion, one hundred thirty-five million, four hundred fifty-six thousand, two hundred sixty-one".