1345131441 has 10 divisors (see below), whose sum is σ = 2009394002. Its totient is φ = 896754240.

The previous prime is 1345131427. The next prime is 1345131481. The reversal of 1345131441 is 1441315431.

1345131441 is a `hidden beast` number, since 1 + 3 + 4 + 513 + 144 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1035230625 + 309900816 = 32175^2 + 17604^2 .

It is not a de Polignac number, because 1345131441 - 2⁶ = 1345131377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345131401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8303200 + ... + 8303361.

Almost surely, 2^1345131441 is an apocalyptic number.

It is an amenable number.

1345131441 is a deficient number, since it is larger than the sum of its proper divisors (664262561).

1345131441 is an equidigital number, since it uses as much as digits as its factorization.

1345131441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16606573 (or 16606564 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1345131441 is about 36676.0336050669. The cubic root of 1345131441 is about 1103.8792622569.

Adding to 1345131441 its reverse (1441315431), we get a palindrome (2786446872).

The spelling of 1345131441 in words is "one billion, three hundred forty-five million, one hundred thirty-one thousand, four hundred forty-one".