1345289705 has 4 divisors (see below), whose sum is σ = 1614347652. Its totient is φ = 1076231760.

The previous prime is 1345289689. The next prime is 1345289719. The reversal of 1345289705 is 5079825431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 388562944 + 956726761 = 19712^2 + 30931^2 .

It is not a de Polignac number, because 1345289705 - 2⁴ = 1345289689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134528966 + ... + 134528975.

It is an arithmetic number, because the mean of its divisors is an integer number (403586913).

Almost surely, 2^1345289705 is an apocalyptic number.

It is an amenable number.

1345289705 is a deficient number, since it is larger than the sum of its proper divisors (269057947).

1345289705 is an equidigital number, since it uses as much as digits as its factorization.

1345289705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269057946.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 1345289705 is about 36678.1911358780. The cubic root of 1345289705 is about 1103.9225535643.

The spelling of 1345289705 in words is "one billion, three hundred forty-five million, two hundred eighty-nine thousand, seven hundred five".