1345405871 has 4 divisors (see below), whose sum is σ = 1345542000. Its totient is φ = 1345269744.

The previous prime is 1345405849. The next prime is 1345405883. The reversal of 1345405871 is 1785045431.

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 1345405871 - 2³⁰ = 271664047 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 (1345405771) 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, 51971 + ... + 73428.

It is an arithmetic number, because the mean of its divisors is an integer number (336385500).

Almost surely, 2^1345405871 is an apocalyptic number.

1345405871 is a deficient number, since it is larger than the sum of its proper divisors (136129).

1345405871 is a wasteful number, since it uses less digits than its factorization.

1345405871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136128.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 1345405871 is about 36679.7746857856. The cubic root of 1345405871 is about 1103.9543272846.

The spelling of 1345405871 in words is "one billion, three hundred forty-five million, four hundred five thousand, eight hundred seventy-one".