1345205143 has 4 divisors (see below), whose sum is σ = 1345369360. Its totient is φ = 1345040928.

The previous prime is 1345205129. The next prime is 1345205159. The reversal of 1345205143 is 3415025431.

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

It is a cyclic number.

It is not a de Polignac number, because 1345205143 - 2²¹ = 1343107991 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 (1345205843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69138 + ... + 86431.

It is an arithmetic number, because the mean of its divisors is an integer number (336342340).

Almost surely, 2^1345205143 is an apocalyptic number.

1345205143 is a deficient number, since it is larger than the sum of its proper divisors (164217).

1345205143 is an equidigital number, since it uses as much as digits as its factorization.

1345205143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164216.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1345205143 is about 36677.0383618961. The cubic root of 1345205143 is about 1103.8994230187.

The spelling of 1345205143 in words is "one billion, three hundred forty-five million, two hundred five thousand, one hundred forty-three".