812842546 has 8 divisors (see below), whose sum is σ = 1231336044. Its totient is φ = 402397200.

The previous prime is 812842543. The next prime is 812842559. The reversal of 812842546 is 645248218.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 655616025 + 157226521 = 25605^2 + 12539^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 812842499 and 812842508.

It is not an unprimeable number, because it can be changed into a prime (812842543) 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, 2011785 + ... + 2012188.

Almost surely, 2^812842546 is an apocalyptic number.

812842546 is a deficient number, since it is larger than the sum of its proper divisors (418493498).

812842546 is a wasteful number, since it uses less digits than its factorization.

812842546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024076.

The product of its digits is 122880, while the sum is 40.

The square root of 812842546 is about 28510.3936486328. The cubic root of 812842546 is about 933.2589048075.

The spelling of 812842546 in words is "eight hundred twelve million, eight hundred forty-two thousand, five hundred forty-six".