1345023443 has 4 divisors (see below), whose sum is σ = 1388411328. Its totient is φ = 1301635560.

The previous prime is 1345023431. The next prime is 1345023457. The reversal of 1345023443 is 3443205431.

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 1345023443 - 2²⁶ = 1277914579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345023473) 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, 21693896 + ... + 21693957.

It is an arithmetic number, because the mean of its divisors is an integer number (347102832).

Almost surely, 2^1345023443 is an apocalyptic number.

1345023443 is a deficient number, since it is larger than the sum of its proper divisors (43387885).

1345023443 is an equidigital number, since it uses as much as digits as its factorization.

1345023443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43387884.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 1345023443 is about 36674.5612516360. The cubic root of 1345023443 is about 1103.8497186897.

Adding to 1345023443 its reverse (3443205431), we get a palindrome (4788228874).

The spelling of 1345023443 in words is "one billion, three hundred forty-five million, twenty-three thousand, four hundred forty-three".