812142646 has 16 divisors (see below), whose sum is σ = 1397170944. Its totient is φ = 346829544.

The previous prime is 812142607. The next prime is 812142647. The reversal of 812142646 is 646241218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812142647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98530 + ... + 106453.

It is an arithmetic number, because the mean of its divisors is an integer number (87323184).

Almost surely, 2^812142646 is an apocalyptic number.

812142646 is a deficient number, since it is larger than the sum of its proper divisors (585028298).

812142646 is a wasteful number, since it uses less digits than its factorization.

812142646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205275.

The product of its digits is 18432, while the sum is 34.

The square root of 812142646 is about 28498.1165342554. The cubic root of 812142646 is about 932.9909662927.

The spelling of 812142646 in words is "eight hundred twelve million, one hundred forty-two thousand, six hundred forty-six".