1439145882721 has 2 divisors, whose sum is σ = 1439145882722. Its totient is φ = 1439145882720.

The previous prime is 1439145882701. The next prime is 1439145882749. The reversal of 1439145882721 is 1272885419341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1294734482496 + 144411400225 = 1137864^2 + 380015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1439145882721 - 2⁷ = 1439145882593 is a prime.

It is a super-2 number, since 2×1439145882721² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1439145882701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719572941360 + 719572941361.

It is an arithmetic number, because the mean of its divisors is an integer number (719572941361).

Almost surely, 2^{1439145882721} is an apocalyptic number.

It is an amenable number.

1439145882721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1439145882721 is an equidigital number, since it uses as much as digits as its factorization.

1439145882721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The spelling of 1439145882721 in words is "one trillion, four hundred thirty-nine billion, one hundred forty-five million, eight hundred eighty-two thousand, seven hundred twenty-one".