812543345 has 8 divisors (see below), whose sum is σ = 975701376. Its totient is φ = 649601776.

The previous prime is 812543327. The next prime is 812543359. The reversal of 812543345 is 543345218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 812543345 - 2²⁴ = 795766129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45737 + ... + 60966.

It is an arithmetic number, because the mean of its divisors is an integer number (121962672).

Almost surely, 2^812543345 is an apocalyptic number.

It is an amenable number.

812543345 is a deficient number, since it is larger than the sum of its proper divisors (163158031).

812543345 is a wasteful number, since it uses less digits than its factorization.

812543345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108231.

The product of its digits is 57600, while the sum is 35.

The square root of 812543345 is about 28505.1459389353. The cubic root of 812543345 is about 933.1443823140.

The spelling of 812543345 in words is "eight hundred twelve million, five hundred forty-three thousand, three hundred forty-five".