1321717481 has 8 divisors (see below), whose sum is σ = 1528734144. Its totient is φ = 1119250800.

The previous prime is 1321717417. The next prime is 1321717493. The reversal of 1321717481 is 1847171231.

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 1321717481 - 2⁶ = 1321717417 is a prime.

It is a super-2 number, since 2×1321717481² = 3493874199161970722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321717181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1136870 + ... + 1138031.

It is an arithmetic number, because the mean of its divisors is an integer number (191091768).

Almost surely, 2^1321717481 is an apocalyptic number.

It is an amenable number.

1321717481 is a deficient number, since it is larger than the sum of its proper divisors (207016663).

1321717481 is an equidigital number, since it uses as much as digits as its factorization.

1321717481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274991.

The product of its digits is 9408, while the sum is 35.

The square root of 1321717481 is about 36355.4326201738. The cubic root of 1321717481 is about 1097.4368644485.

The spelling of 1321717481 in words is "one billion, three hundred twenty-one million, seven hundred seventeen thousand, four hundred eighty-one".