812422465 has 4 divisors (see below), whose sum is σ = 974906964. Its totient is φ = 649937968.

The previous prime is 812422439. The next prime is 812422529. The reversal of 812422465 is 564224218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564224218 = 2 ⋅282112109.

It can be written as a sum of positive squares in 2 ways, for example, as 607474609 + 204947856 = 24647^2 + 14316^2 .

It is a cyclic number.

It is not a de Polignac number, because 812422465 - 2⁷ = 812422337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 812422465.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81242242 + ... + 81242251.

It is an arithmetic number, because the mean of its divisors is an integer number (243726741).

Almost surely, 2^812422465 is an apocalyptic number.

It is an amenable number.

812422465 is a deficient number, since it is larger than the sum of its proper divisors (162484499).

812422465 is a wasteful number, since it uses less digits than its factorization.

812422465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162484498.

The product of its digits is 30720, while the sum is 34.

The square root of 812422465 is about 28503.0255411597. The cubic root of 812422465 is about 933.0981061829.

The spelling of 812422465 in words is "eight hundred twelve million, four hundred twenty-two thousand, four hundred sixty-five".