845213 has 4 divisors (see below), whose sum is σ = 847740. Its totient is φ = 842688.

The previous prime is 845209. The next prime is 845219. The reversal of 845213 is 312548.

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 386884 + 458329 = 622^2 + 677^2 .

It is a cyclic number.

It is not a de Polignac number, because 845213 - 2² = 845209 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 (845219) 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, 668 + ... + 1461.

It is an arithmetic number, because the mean of its divisors is an integer number (211935).

2⁸⁴⁵²¹³ is an apocalyptic number.

It is an amenable number.

845213 is a deficient number, since it is larger than the sum of its proper divisors (2527).

845213 is a wasteful number, since it uses less digits than its factorization.

845213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526.

The product of its digits is 960, while the sum is 23.

The square root of 845213 is about 919.3546649689. The cubic root of 845213 is about 94.5486624506.

The spelling of 845213 in words is "eight hundred forty-five thousand, two hundred thirteen".