812485421 has 16 divisors (see below), whose sum is σ = 895672320. Its totient is φ = 730885680.

The previous prime is 812485411. The next prime is 812485439. The reversal of 812485421 is 124584218.

812485421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 812485421 - 2¹⁰ = 812484397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812485411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1031990 + ... + 1032776.

It is an arithmetic number, because the mean of its divisors is an integer number (55979520).

Almost surely, 2^812485421 is an apocalyptic number.

It is an amenable number.

812485421 is a deficient number, since it is larger than the sum of its proper divisors (83186899).

812485421 is a wasteful number, since it uses less digits than its factorization.

812485421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664.

The product of its digits is 20480, while the sum is 35.

The square root of 812485421 is about 28504.1298937540. The cubic root of 812485421 is about 933.1222080140.

The spelling of 812485421 in words is "eight hundred twelve million, four hundred eighty-five thousand, four hundred twenty-one".