813605126 has 4 divisors (see below), whose sum is σ = 1220407692. Its totient is φ = 406802562.

The previous prime is 813605123. The next prime is 813605147. The reversal of 813605126 is 621506318.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 813605092 and 813605101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813605123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203401280 + ... + 203401283.

It is an arithmetic number, because the mean of its divisors is an integer number (305101923).

Almost surely, 2^813605126 is an apocalyptic number.

813605126 is a deficient number, since it is larger than the sum of its proper divisors (406802566).

813605126 is a wasteful number, since it uses less digits than its factorization.

813605126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406802565.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 813605126 is about 28523.7642326534. The cubic root of 813605126 is about 933.5506637039.

The spelling of 813605126 in words is "eight hundred thirteen million, six hundred five thousand, one hundred twenty-six".