1321265456517 has 8 divisors (see below), whose sum is σ = 1786499772480. Its totient is φ = 868437389120.

The previous prime is 1321265456491. The next prime is 1321265456549. The reversal of 1321265456517 is 7156545621231.

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 1321265456517 - 2¹² = 1321265452421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321265456587) 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, 3101561892 + ... + 3101562317.

It is an arithmetic number, because the mean of its divisors is an integer number (223312471560).

Almost surely, 2^{1321265456517} is an apocalyptic number.

It is an amenable number.

1321265456517 is a deficient number, since it is larger than the sum of its proper divisors (465234315963).

1321265456517 is an equidigital number, since it uses as much as digits as its factorization.

1321265456517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6203124283.

The product of its digits is 1512000, while the sum is 48.

The spelling of 1321265456517 in words is "one trillion, three hundred twenty-one billion, two hundred sixty-five million, four hundred fifty-six thousand, five hundred seventeen".