1291245518371 has 8 divisors (see below), whose sum is σ = 1330385210784. Its totient is φ = 1252469916480.

The previous prime is 1291245518369. The next prime is 1291245518383. The reversal of 1291245518371 is 1738155421921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1291245518371 - 2¹ = 1291245518369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291245518071) 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, 91015431 + ... + 91029616.

It is an arithmetic number, because the mean of its divisors is an integer number (166298151348).

Almost surely, 2^{1291245518371} is an apocalyptic number.

1291245518371 is a deficient number, since it is larger than the sum of its proper divisors (39139692413).

1291245518371 is a wasteful number, since it uses less digits than its factorization.

1291245518371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182045261.

The product of its digits is 604800, while the sum is 49.

The spelling of 1291245518371 in words is "one trillion, two hundred ninety-one billion, two hundred forty-five million, five hundred eighteen thousand, three hundred seventy-one".