812465 has 4 divisors (see below), whose sum is σ = 974964. Its totient is φ = 649968.

The previous prime is 812443. The next prime is 812467. The reversal of 812465 is 564218.

812465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113569 + 698896 = 337^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 812465 - 2⁶ = 812401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812467) 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, 81242 + ... + 81251.

It is an arithmetic number, because the mean of its divisors is an integer number (243741).

2⁸¹²⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

812465 is a deficient number, since it is larger than the sum of its proper divisors (162499).

812465 is a wasteful number, since it uses less digits than its factorization.

812465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162498.

The product of its digits is 1920, while the sum is 26.

The square root of 812465 is about 901.3684041500. The cubic root of 812465 is about 93.3114390254.

The spelling of 812465 in words is "eight hundred twelve thousand, four hundred sixty-five".