1321440501 has 8 divisors (see below), whose sum is σ = 1762223104. Its totient is φ = 880809120.

The previous prime is 1321440451. The next prime is 1321440509. The reversal of 1321440501 is 1050441231.

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

It is not a de Polignac number, because 1321440501 - 2⁶ = 1321440437 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 (1321440509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15541 + ... + 53706.

It is an arithmetic number, because the mean of its divisors is an integer number (220277888).

Almost surely, 2^1321440501 is an apocalyptic number.

It is an amenable number.

1321440501 is a deficient number, since it is larger than the sum of its proper divisors (440782603).

1321440501 is an equidigital number, since it uses as much as digits as its factorization.

1321440501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75611.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1321440501 is about 36351.6230861842. The cubic root of 1321440501 is about 1097.3601992250.

Adding to 1321440501 its reverse (1050441231), we get a palindrome (2371881732).

The spelling of 1321440501 in words is "one billion, three hundred twenty-one million, four hundred forty thousand, five hundred one".