1445441311 has 4 divisors (see below), whose sum is σ = 1445517432. Its totient is φ = 1445365192.

The previous prime is 1445441267. The next prime is 1445441323. The reversal of 1445441311 is 1131445441.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1131445441 = 7 ⋅161635063.

It is a cyclic number.

It is not a de Polignac number, because 1445441311 - 2¹⁷ = 1445310239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1445441311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445441411) 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 3 ways as a sum of consecutive naturals, for example, 16380 + ... + 56206.

It is an arithmetic number, because the mean of its divisors is an integer number (361379358).

Almost surely, 2^1445441311 is an apocalyptic number.

1445441311 is a deficient number, since it is larger than the sum of its proper divisors (76121).

1445441311 is an equidigital number, since it uses as much as digits as its factorization.

1445441311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76120.

The product of its digits is 3840, while the sum is 28.

The square root of 1445441311 is about 38018.9598884557. The cubic root of 1445441311 is about 1130.6637995594.

Adding to 1445441311 its reverse (1131445441), we get a palindrome (2576886752).

The spelling of 1445441311 in words is "one billion, four hundred forty-five million, four hundred forty-one thousand, three hundred eleven".