1345039771 has 4 divisors (see below), whose sum is σ = 1346911200. Its totient is φ = 1343168344.

The previous prime is 1345039769. The next prime is 1345039781. The reversal of 1345039771 is 1779305431.

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 1345039771 - 2¹ = 1345039769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345039781) 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, 934636 + ... + 936073.

It is an arithmetic number, because the mean of its divisors is an integer number (336727800).

Almost surely, 2^1345039771 is an apocalyptic number.

1345039771 is a deficient number, since it is larger than the sum of its proper divisors (1871429).

1345039771 is an equidigital number, since it uses as much as digits as its factorization.

1345039771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871428.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 1345039771 is about 36674.7838575771. The cubic root of 1345039771 is about 1103.8541854236.

The spelling of 1345039771 in words is "one billion, three hundred forty-five million, thirty-nine thousand, seven hundred seventy-one".