1296717440731 has 4 divisors (see below), whose sum is σ = 1296720439432. Its totient is φ = 1296714442032.

The previous prime is 1296717440663. The next prime is 1296717440741. The reversal of 1296717440731 is 1370447176921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1296717440731 - 2¹⁵ = 1296717407963 is a prime.

It is a super-2 number, since 2×1296717440731² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296717440741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713370 + ... + 1761343.

It is an arithmetic number, because the mean of its divisors is an integer number (324180109858).

Almost surely, 2^{1296717440731} is an apocalyptic number.

1296717440731 is a deficient number, since it is larger than the sum of its proper divisors (2998701).

1296717440731 is an equidigital number, since it uses as much as digits as its factorization.

1296717440731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998700.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 1296717440731 in words is "one trillion, two hundred ninety-six billion, seven hundred seventeen million, four hundred forty thousand, seven hundred thirty-one".